How to troubleshoot a no start GM 4.3L pick up?

Testing a Cranks but Does Not Start condition on your GM 4.3L, 5.0L, 5.7L pick up, van or SUV is not that hard to do, if you have a solid diagnostic strategy. In this article I’ll show you the basics of testing such a problem.

Why does my Dads 93 Chevy truck die?

My Dads 93 was doing what seems to be the same thing as yours. It ended up being the Fuel Pump Relay. If I press the gas pedal it dies. It’s been acting weird for a while now. For instance, when I take off from a dead stop at a light it sort of hesitates when I hit the gas.

What’s the fuel pressure on a Chevy long tern?

Long tern fuel trim seems to hang aroun 162-65 on a hot engine, short term fuel trim starts at 128 and sometimes goes to around 134. Vacuum at 2500 in park is around 20inches. Ok.. Verify there is 18-20 of fuel pressure when you dead head the fuel pump.

Why does my Chevy Truck start and idle?

Not sure why this test caused a better and longer gas flow than the above test of just putting the ignition in the ON position and seeing how much gas comes out of the line before the fuel filter. Last test says to start the vehicle and remove the relay.

Why is my truck not running when I leave work?

Truck wouldn’t stay running when leaving work today. It starts then dies after a couple of seconds. Had it towed to a friends where we pulled out the Chilton book and began troubleshooting.

Can a lack of spark timing cause an engine to run rough?

Lack of proper spark timing can cause a different problem: one or more of the cylinders may misfire. That is to say combustion may be disrupted. You will feel, and maybe hear, this as a brief stutter in the engine. You might feel that the engine runs rough or vibrates at idle, say, when you’re sitting at a red light.

Can a bad crankshaft sensor cause engine to run rough?

You will feel, and maybe hear, this as a brief stutter in the engine. You might feel that the engine runs rough or vibrates at idle, say, when you’re sitting at a red light. This is similar to the above in that it stems from poor spark timing. As seen with rough idling, sometimes crankshaft position sensor problems are worse at low engine speeds.

Why does my GMC Sierra 1500 not shift?

74 people found this helpful. Just get someone to shift it while you watch the cable on the drivers side of the tranny. You should see the cable rotate the shifter. If it ran good, you parked it, it got f’in cold and now it doesn’t work maybe you have some water in the system, a line may be frozen (never heard of this though).

Can you feel the gears on a GMC Sierra?

When you move the shifter can you feel the regular amount of resistance, can you feel the gears. If not the cable is broken or disconnected from the tranny. 94 people found this helpful. If the cable is good we need to check line flow/pressure.

Why is my return line cracking on my GMC Sierra 1500?

So you cracked on the return line. It should naturally drain. If the flow/pressure increased when the truck started that means that you are sucking fluid from the pan therefore the pump is working. That means that the problem is most likely in the valve body.

What kind of transmission does a 1994 GMC Sierra have?

I’ve got a 1994 GMC Sierra 4X4 5.7 I purchased from an older couple. It has been sitting a year. She said years ago they had tranny trouble; it would stay in low.

How to identify transmissions in’94 Chevy trucks?

The NV3500 is an all-aluminum casting with the bell housing integral to the transmission. Identify the Borg Warner T5. The Borg Warner T5 is a five-speed, “toploading” transmission with a square waffle-pattern aluminum casing.

How to fix a GMC Sierra 1500 transmission?

Yes that’s has happen to two of my 93 Chevy Silverado 4×4 , 1 and 2 fine then free wheel in overdrive. Just change 1-2 – 3-4 solenoids first and if that doesn’t work change the computer per Ebay it’s the cheapest. Hope this helps JJD 36 people found this helpful. My buddy changed his distributor and cured the tranny problems.

What happens when you put a GMC Sierra in drive?

Now the truck will shift 1-2 manually, but when you put it in drive, it free wheels: nothing at all; no drag or anything. The computer just checks code 12. If you put it in drive, it stays in low. If you put it in low and lift the handle, it will go into second immediately and when you move to drive—nothing.

What makes a 1997 GMC C2500 no start?

1997 GMC C1500, C2500, C3500 Pick Up. 1997 GMC K1500, K2500, K3500 Pick Up. All of the information you need to diagnose a misfire or a no-start problem (caused by the ignition coil, the ignition module, or the crankshaft position sensor).

What kind of problem does a 1997 GMC pick up have?

1997 GMC K1500, K2500, K3500 Pick Up. All of the information you need to diagnose a misfire or a no-start problem (caused by the ignition coil, the ignition module, or the crankshaft position sensor). Wiring diagrams.

What kind of problems does a 1993 Jimmy have?

I have a 1993 Jimmy. It has been having starting issues. We have heard everything from the fuel injectors needs to be cleaned to replacing the water pump. We have replaced the computer twice, the second time the garage replaced it free. But now it does not start but turns over.

Are there any problems with the Chevy 4.3 Vortec engine?

The 4.3 Vortec engines made from 1996-2002 (L35 and LF6) have been reported to have engine knock problems. In a properly functioning engine, fuel burns in even pockets instead of all at once. The pockets burn in even timing, in sync with engine cycles. Engine knock occurs when the fuel burns unevenly and out of sync with the engine cycles.

What to do if your Chevy S10 won’t start?

EASY…Popping, Vapor locking…Jump time??… 1995-2008 – YouTube If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

What causes a Chevy Vortec distributor to not turn?

The cap is prone to warping from the heat, which results in the cap rubbing against the distributor rotor button. This causes the rotor bushing to wear out and the distributor begins to no longer be able to turn. The simplest option here to fix this problem is upgrading to a distributor that has an aluminum housing on it.

What causes a car to not start with no spark?

Without spark, the engine will Crank but Not Start. The ignition system of the GM vehicles covered by this article use a distributor type system. In my experience, the most common component failures, of the ignition system that cause a No Start No Spark Condition are: Distributor cap. Crank sensor.

Why does my GM pickup engine not start?

How To Test The Fuel Pump On GM TBI Fuel Systems (for throttle body fuel injection fuel system equipped vehicles). A failure in one of the Passlock system’s components will cause the engine to start and then stall after a few seconds. This is due to the fact that the PCM, in your GM pickup or SUV, has disabled the fuel injectors.

Why does my car not start when I turn the key?

This condition is usually due a failed fuel pump, a failed ignition coil, a failed ignition control module, a failed crank sensor, etc… that lets the engine crank (turn over) but does not let it start. A No Crank Condition means that the engine is not turning over when you turn the key to crank the engine.

How to test a no spark no start condition?

How To Test A Misfire / No Spark No Start Condition (at: easyautodiagnostics.com ). How To Test The Crank Sensor (GM 4.3L, 5.0L, 5.7L). How To Test The Camshaft Position Sensor Diagnostic Trouble Codes: P0340, P0341.

How to fix a hard starting Chevy S10?

Rather than crank the starter over and over.Turn your key to the on position about ten times …..Turn key to on wait 4 seconds before turning back to off then repeat before engaging starter. 46 people found this helpful. if it’s leaking from the spider then that will make it worse.

What causes a burnt out light bulb on a Chevy?

A burnt out bulb is usually discolored and pieces of the filament will be loose inside the bulb. If a visual inspection shows the bulb is still good, there may also be a broken wire in the harness to that light.

Why are the headlights not working on my Chevy?

A wiring issue will require a check of wires with a multimeter with the help of your vehicle’s schematics. Only the low-beams or high-beams work: If your headlights both work but only when the low-beams or high-beams are on, the problem is likely with the dimmer switch.

What is the wiring diagram on a 1982 Chevy truck?

Most recently, I picked up a GM 1982 Light Duty Truck Factory Service Manual, which includes a full wiring diagram. I won the bid for $17.00. Back in 1992, at a local swap meet, I paid $30 for the same GM factory Service manual for my 77. The older manuals didn’t include wiring. I currently have a bid in myself on a 1977 GM Factory Wiring Manual.

Why does my GM 4.3L engine not start?

No Start Condition Basics There are three very basic components that the engine, in your GM vehicle, needs to start and they are: Air, Fuel and Spark. When your 4.3L, 5.0L or 5.7L GM vehicle cranks but does not start, it’s because one of these components is missing from the mix.

Why are my Chevy Trailblazer lights not working?

Still, headlight problems are no problem with the right information. Whether your Chevy TrailBlazer lights aren’t working, or your Chevy Corvette, the following diagnostic process will help you figure out why your Chevy’s headlights aren’t working.

What causes the fuel pump to not start?

The fuel pump is running and delivering normal pressure to the engine But, with all that working your engine still will not start. So, the most likely cause, is that the fuel injectors are probably not opening. The (PCM) uses the trigger signal from the crankshaft position sensor; and/or camshaft position sensor to pulse the injectors.

What causes a car engine to not start?

All engines require three things to start and run: spark, fuel and compression. If any one of these is missing, your engine will not start. But with all that working your engine will not start. Engine Will Not Start-The most likely cause is that the fuel injectors are probably not opening.

Why does my GM car say no start no crank?

How to diagnose a no start no click on GM vehicle. If you have a late model GM vehicle and turn the key only to hear nothing, you’ll most likely think you have a dead battery—and you may. But a no start, no crank, no click condition can be far more involved than that.

Can a bad fuel distributor cause a truck to not start?

If you have rpm signal crank sensor is good. Yes they have a fuel distributor that’s a problem most times plastic fuel lines will crack. But it would still fire up and run bad. If it has a bad PCM a scan tool most times will not communicate with it.

How can I tell if my car is not getting fuel?

Usually, you figure out if you have a fuel delivery problem by process of elimination. If you have good spark and clean air, you’re probably not getting fuel. Some folks like using starter fluid as a check.

What causes a Chevy Blazer to not start?

Believe It or Not neutral safety switch on the trans will cause them to not start even if everything else works . On my second Blazer it was the problem the both times Here ya go, let’s see if I can make anyone’s head spin on this one.. 2000 Chevy blazer zr2, stick key in , cranks and no start.

Why does my Vortec engine not start at all?

11 people found this helpful. check your fuel pressure. The vortec engines are known to have the fuel pressure regulator fail and leak into the intake. At the worst of it the vehicle cant start at all, it will flood a couple cylinders and not feed fuel to the rest. This can be checked for by checking fuel pressure and leakdown rate.

Why does my 2006 Chevy Silverado not start?

Visited the website for 20 consecutive days. Re: 2006 chevy silverado cranks but wont start. Check the crank sensor that seems to cause intermittent starting stupidness. had that problem on my silverado. You can’t post conmments that contain an email address.

What makes a GM ignition coil spark away?

This Triggering Signal is known as the IC (Ignition Control) Signal in the GM service literature. The ignition control module now starts to open and close the primary current circuit of the ignition coil and as you may already be aware, it’s this opening and closing action that makes the ignition coil spark away.

Why does my Chevy Silverado truck not start?

Would start after cranking for a few minutes for a month. Now it will not start for anything. Wasn’t getting spark when inchecked. Replaced ignition coil, nothing, replaced cap and rotor, nothing, replaced crank positions sensor, nothing, replaced ICM, finally have spark. Still, will crank, won’t start.

How to test no spark no start test?

No spark from all of the Coil-On-Plug Ignition Coils. No fuel injector pulses from the fuel injector connectors as tested using a Noid Light. P0335: No Crank Sensor Signal Detected. P0336: Inconsistent Crank Sensor Signal Detected.

Why did my 2000 Chevy Silverado stop running?

My 2000 Chevy Silverado Pickup stopped running. It will start My 2000 Chevy Silverado Pickup stopped running. It will start and run for a few seconds, but then stalls. I’ve changed the fuel filter, rotor and rotor cap with no success.

Why does my GM Truck start and die?

Starts and runs fine and then all of the sudden. Yesterday morning it starts and dies after about 1 second, started it again and same results. It does this several times. After about 30 mins of trying and talking to it a while it started and ran fine. Drove over to the garage turned it off and restarted several times and it was fine.

What kind of truck starts and then dies?

99 Z-71 with a 350 5.7. Starts and runs fine and then all of the sudden. Yesterday morning it starts and dies after about 1 second, started it again and same results. It does this several times. After about 30 mins of trying and talking to it a while it started and ran fine.

What causes a GMC Jimmy 4.3 engine to die?

Gmc jimmy 4.3 will sometimes die while driving in highway when i let off the accelorater pedal. my 95 blazer when coming to a stop and braking it idles high and rough sounding and it sputters and will clink and clank as stoppung and almost dies no engine light on what could be causing this. Your engine may have a vacuum leak.

What causes a car to have a no start condition?

The engine pistons and valves (and all the other related components like: timing chains, etc.) are the ones responsible for the induction of the fresh air the engine needs for the combustion process. Although rare, internal engine mechanical problems can and do cause no-start conditions. Blown head gasket. Blown engine. 4.)

Why is my Chevy Vortec 4300 V6 leaking fuel?

In the L35 and LF6 engines, the spider injectors are known to leak at the pressure regulator and at the supply and return lines due to a design fault. Outside of leaking fuel onto the exterior of the engine itself, it can cause excess fuel to get sucked into the engine.

What causes a Chevy truck to turn over but not start?

Plenty of turn over speed. With a test light there’s voltage at both sides of the coil but NO spark. Voltage at the throttle body injectors but NO fuel sprays. Fuel pump pumps. NO spark and NO fuel, turns fine. Rotor button turns, cap and rotor clean. Under the dash at the fuse panel there’s no voltage on the crank fuse.

What’s the problem with my Chevy Silverado 1500?

When it decides to act right, all is will. Anyone else found a solution? Chevy silverado 1500 2004. The same problem, random intermittent starting. I had had this problem before about 5 times and each time I disconnected and reconnected the negative battery cable it started fine. This time that didn’t work.

What’s the difference between no start and no crank?

It’s important to know that a no crank and a no start condition are not the same thing since this article only concentrates on testing a no start condition. In layman’s terms, a No Start Condition means that your vehicle’s starter motor is cranking the engine but the engine is not starting.

What does it mean when your car says no crank?

A No Crank Condition means that the engine is not turning over when you turn the key to crank the engine. The most common problem, that causes this condition is a failed starter motor. The most common problem, that causes this condition is a failed starter motor.

What happens to the crank sensor on a GMC?

The crankshaft sensor on GMC vehicles is synced to the powertrain control module, or PCM. When the crank sensor is replaced, it must be resynced to the PCM. Without resyncing, the PCM cannot properly determine the position of the crankshaft.

Can a Vortec 4.3 crank but won’t start?

It cranks like a champ, but just doesn’t start, no check engine light on, and nothing else comes up on the good scanners either. Once it starts there is no problem, so the mechanics working on it have just been changing parts trying to guess, I guess. It has new plugs, wires, distributor cap and rotor, ICM, MAP censor and fuel injectors.

Can a GM car still start with a misfire?

If you have one or just two readings that are under 90 PSI your GM vehicle will still start and run, albeit with a misfire condition. I’ve written a ‘How To Do a Compression Test’ article that you may find useful.

What to do if your GM car won’t start?

So many different things can cause a no start condition that troubleshooting it can turn your GM vehicle into a money pit, if you don’t have a basic diagnostic strategy. The key to saving yourself time and money is checking for the basics first. The basics are spark and fuel. To check the basics, you need tools. There’s just no way around it.

Is it possible the starter is going bad?

It is possible the starter is going bad (the solenoid portion of it). Thanks for the response. The battery terminals are tight and clean. my brother got the starter bench tested at Oreilly’s and it checked out just fine. It’s almost like the engine is seized (i know it’s not though).

Can a car start with no crank or no starter?

Yes, especially if there is a bad connection to the starter, or from the battery. Doesn’t take much juice to click the solenoid, but it takes a lot of juice to turn the starter and turn over the engine.

What causes a GMC truck to turn over but not start?

If the engine starts up normally after doing that, it means that fuel pressure is bleeding off and the fuel pump needs to prime the lines before it can start. It can bleed off from one of two places. 1. Fuel pressure regulator has an internal leak, and fuel is bleeding off back to the tank though the return line. 2.

What should I do if my Chevy Silverado wont start?

Chevrolet recommends waiting 15 seconds in between each attempt at starting the vehicle and not cranking it for more than 15 seconds per attempt, to prevent draining the battery or burning up the starter. Check that your Silverado is in either Park or Neutral if it has an automatic transmission, as it will not start if it is in gear.

Is it possible that the starter could check out fine?

Is it possible that the starter could check out fine on a benchg test but still not work when in the truck? Yes, especially if there is a bad connection to the starter, or from the battery. Doesn’t take much juice to click the solenoid, but it takes a lot of juice to turn the starter and turn over the engine.

Why does my car starter not turn on?

Doesn’t take much juice to click the solenoid, but it takes a lot of juice to turn the starter and turn over the engine. The other thing is it is an intermittent problem on the vehicle, so if the starter was intermittently acting up when installed, it could also be intermittently acting up when tested at the auto parts store.

Why does my GMC engine start but not run?

Repair guides and support for cars, trucks, and SUVs manufactured by GMC. Answered! View the answer I have this problem too Is this a good question? An engine will start but not run when the fuel runs out .

What to do if your truck wont start?

To avoid throwing guesses and parts at your truck, have the truck scanned for trouble codes as a first step. Some of the auto parts suppliers offer free code reading like Pepboys, Nappa, Advanced auto parts,etc and some of the guys are very knowledgeable and may have seen the issue often and put you on the right track.

Can a bad crank cap cause a no start?

The ignition control module could be bad. The crankshaft position sensor could be bad. Testing the distributor cap, the ignition coil to distributor cap high tension wire, the ignition coil, the ICM, and the crank sensor can by done by the do it yourself-er (DIY’er) and the following tutorials will help you test the ignition system:

What kind of warranty does a 1992 Chevrolet C1500 have?

Additionally, find 1992 Chevrolet C1500 warranty and reliability information, such as limits on bumper-to-bumper coverage and major components. The monthly payment is based on the price of this vehicle assuming it is financed.

What kind of engine does a 1995 Chevy 350 have?

Since then, it has been used in many different styles of vehicles. The 1995 Chevy 350-cubic-inch engine come in three versions: low-compression, medium-compression and high-compression. The low-compression version of the 1995 Chevrolet 350 was used in four vehicles: Suburban, G30 van, C/K3500 and C/K2500.

What was the compression ratio of a 1995 Chevy 350?

Low Compression The low-compression version of the 1995 Chevrolet 350 was used in four vehicles: Suburban, G30 van, C/K3500 and C/K2500. It had a cylinder bore of 4 inches, a piston stroke of 3.48 inches and an 8.3:1 compression ratio. This engine produced 180 horsepower and 295 foot-pounds of torque.

How long does it take to get the Chevrolet Performance catalog?

Get a head start on the new year by ordering your printed copy of the 2021 Chevrolet Performance catalog. Allow 6-8 weeks for delivery. For nearly 60 years, we’ve fueled the passion of automotive enthusiasts.

What are the symptoms of a bad ignition module?

The following are usually the most common symptoms of a bad spark plug wires, or a bad distributor cap and rotor on this type of GM distributor mounted ignition control module: The car (or truck, or mini-van, or van) starts and runs, but with a misfire. The check engine light is on. Lack of power.

Where does the pick up coil signal go in an ignition module?

This pick up coil signal is sent directly to the ignition control module. The ignition module, upon receiving this pick up coil signal (for all intended purposes it’s a crankshaft position sensor signal) converts it to a digital signal that is now sent to the fuel injection computer.

What does code 86 mean on a Chevy?

For example, General Motor’s code 86 will appear as eight long flashes, followed six shorter flashes. There will be a dark, silent pause between coding sets. Turn your Chevrolet’s electrical system off and exit the car.

Why does my Chevy truck not start up?

The P1516 code may be a clue. P1516 is a problem with the Throttle Actuator Control (TAC) Module which can (according to some of my reading) cause the PCM to go to reduce power (stop firing the injectors) from lack of signal. It seems this can also be caused by faulty APP (Accelerator Pedal Position) sensor.

Why does my GMC Sierra engine not start?

It seems this can also be caused by faulty APP (Accelerator Pedal Position) sensor. First I would check the INJ1 and INJ2 fuses in the under the hood fuse box.

What to do if your Chevy Silverado won’t start?

Simple fix by checking the ground in the harness right behind the passenger side cylinder head. Trace the break and wire it to a new location for a ground such as the front of the cylinder head as I did. Loading…

Why does my GMC Silverado have no crank?

This is a fix for a known electrical issue with the 2003-2007 C/K series GM Trucks where a bad ground causes multiple issues. Such as no start, no crank, intermittent no gauges, and sometimes the theft light would stay on, and the parking lights would stay on.

What kind of engine cranks wont start up?

Engine Cranks but Wont Start Up?: I Have a 2005 Chevy Silverado Engine cranks but wont start up? I have a 2005 Chevy Silverado 1500 2 wheel drive 4.3L V6. I recently replaced the fuel pump because the truck would not start.

What should I do if my Chevy truck wont start?

Truck tries to turn over but wont fire. Replaced cap and rotor just this afternoon and it still will not start. helpful? Please use the following link to ask this as a new question. Include all information about the vehicle and what it did prior to this problem.

What does it mean when your car says no start?

A No Crank Condition means that the engine is not turning over when you turn the key to crank the engine. The most common problem, that causes this condition is a failed starter motor. If your vehicle is suffering a No Crank Condition, this tutorial may be a good starting point: How To Test The Starter Motor (GM 4.3L, 5.0L, 5.7L).

What causes engine knock on a 4.3L Vortec?

Engine knock can be caused by a ton of factors, such as low-grade fuel, bad spark plugs, carbon build-up, etc. Engine knock is terrible for your engines internals and can cause serious damage to the pistons and to the cylinder walls. On the 4.3L vortec, the cause of the engine knock has not necessarily been figured out, still to this day.

Why does my car not start when I start it?

There are three very basic components that the engine, in your GM vehicle, needs to start and they are: Air, Fuel and Spark. When your 4.3L, 5.0L or 5.7L GM vehicle cranks but does not start…it’s because one of these components is missing from the mix.

Why is my Chev k1500 350 Vortec not starting?

So I went and bought a sensor installed it and forgot to reset the computer before trying to start it. It changed nothing, still the same old problem. So I decided to reset the computer by disconnecting the battery, a good 10 to 15 minutes or so. Hooked it back up and still has the same problem.

What’s the fuel pressure on a 1996 Chevy c1500?

I stuck a fuel pressure gauge on the fuel rail port and was reading about 50 psi. Unfortunately, as high as that sounds, the injectors won’t even open until you are at about 60 psi.

What does it mean when a truck won’t start?

It might be the computer, but it might be a sensor or a $10 relay. You won’t get diagnostics through the internet. I have a 1998 Chevy 2500 w/ a 5.7 that wouldn’t start even though the truck had good spark, fuel in the tank, and I could hear the pump spin up and pressurize when I turned the key.

Why does my Chevy C / K 1500 not start?

FYI – If the pass lock isn’t working properly, the computer will not keep the fuel pump on when the key is turned to start and released. 72 people found this helpful. Note: If the battery dies or is disconnected, or the computer is disconnected, this procedure may have to be repeated.

Why does my 96 Chevy Express van not start?

Also had a similar issue spin and no start with a 96 Chevy Express Van with the 5.7L. This vehicles issue turned out to be a shorted pink wire in the wiring harness that runs up the passenger side of the block. The vehicle had died while driving several times and wouldn’t start. Then, finally after blowing a couple fuses, would start at all.

I stuck a fuel pressure gauge on the fuel rail port and was reading about 50 psi. Unfortunately, as high as that sounds, the injectors won’t even open until you are at about 60 psi.

Why does my Ford pick up not start?

Alright, let’s get started with the next subheading. The most important thing that you need to keep in mind, when you’re faced with your Ford vehicle cranking but not starting is that the engine needs air, fuel and spark to start. If any one of these is missing from the mix, your 4.6l, 5.4L Ford pick up (car, van, or SUV) will not start.

Can a 4.6L Ford pick up not start?

If any one of these is missing from the mix, your 4.6l, 5.4L Ford pick up (car, van, or SUV) will not start. It really is as simple as that (theoretically speaking that is and who speaks theoretical now-a-days?).

What does a crank but not start condition mean?

Related Test Articles. You can find this tutorial in Spanish here: Cómo Probar Un Arranca Pero No Prende (4.6L, 5.4L Ford V8) (at: autotecnico-online.com ). A a cranks but does not start condition means that your vehicle’s starter motor is cranking the engine but the engine is not starting.

Why is my Chevy Silverado 1500 not starting?

However, today, when the truck will crank and start, the antitheft icon goes off after a few seconds with the key on and stays off while the truck is running. It never flashed either today or yesterday though. And I don’t know if the antitheft system disables cranking or starting or both.

A No Crank Condition means that the engine is not turning over when you turn the key to crank the engine. The most common problem, that causes this condition is a failed starter motor. If your vehicle is suffering a No Crank Condition, this tutorial may be a good starting point: How To Test The Starter Motor (GM 4.3L, 5.0L, 5.7L).

What to do if your car won’t start with starter fluid?

Check for spark with a spark tester. If spark is present at all 8 cylinders, the next step is to see if the engine starts with starter fluid. If spark is NOT present at all 8 cylinders, then the Passlock system is not the cause of the no start condition. Start the engine with starter fluid.

How can I tell if my truck is not starting?

A test for DC voltage between a ground point (eg. battery negative terminal or the engine block) and the large wire on the starter can diagnose a blown fuse (it will read 0V) but it can’t be used to indicate if the connection or starter are ok.

Why does my starter click when I turn the key?

It sounds like power is getting to the starter because I can hear a loud click when I turn the key. I’ve researched the topic thoroughly on this site but no one has seemed to have the same problem. In all the other cases there is click coming from the starter. Any help greatly appreciated. Thanks

What to do when your GMC Truck won’t start?

Try turning your key to the run position a few times (with out starting). Then try to start it. If it starts, sounds like what mine did. I replaced the fuel pump assembly and that fixed the problems. Very common problem.

Why does my 97 Chevy truck not start?

97 Chevy truck won’t start when it gets cold?? When ever it gets cold my truck will not start. Seems to be fuel pressure but can’t smell any gas like it was flooding. It does’nt even fire like it wants to start.

What kind of truck won’t start when it gets cold?

The last cold spell I plugged it in and I could get it started but no luck this time. Any input would be great. 97 5.7 vortech chevy pickup 4×4. Thanks

Why does my 2001 Astro van not start?

by Lee Sallings. The three most common causes of a no-start condition in your 2001 Chevy Astro van are starting/charging system failure, ignition system failure and fuel system failure.

Where is the fuel pump on a Astro van?

If it is good, check for power at the fuel pump electrical connector located near the rear of the fuel tank on the driver’s side of the van. In the Chevy Astro van, power is supplied to the fuel pump by the the gray wire on the electrical connector when the engine is being cranked.

What should battery voltage be in Astro van?

A measurement of 12.5 volts is considered discharged, and the battery should be charged before any further testing. Any measurement below 11 volts indicates a severely discharged battery–the battery is most likely damaged and should be replaced. If the battery measures above 12.7 volts, proceed to the next step.

Why is my intermitent light not working on my GM Truck?

C0222 also goes to your ABS system – the right front wheel speed sensor is not sending a signal. These sensors fail fairly commonly on these trucks, and isnt too difficult of a fix. I hope this helps, and I wish you the best of luck in getting this issue sorted out. I have checked the connection at the alternator.

When did the intermitent blinking battery light stop coming on?

They light eventually stopped coming on. About 150 miles later the light started doing it again, this time the volt meter had dropped about 2-3 volts. I was still about 120 miles from home so I turned off my stereo, my AC, and didnt even use cruise control. I was determined to make it home.

Why does my battery light keep going on and off?

I was on a long road trip. Out in the middle of no where my battery light started intermittently going on and off. I immediately checked the volt meter. It was normal at 14v. I keep driving. They light eventually stopped coming on. About 150 miles later the light started doing it again, this time the volt meter had dropped about 2-3 volts.

How does a K and N air intake kit work?

K&N engineers start by employing 3D-laser scanning to create a precise model of each vehicle’s engine bay, and utilize the most advanced technology on the market to create airflow-optimized kits. The performance of my 2015 GMC Sierra is so much better now than it was with the stock air intake and my gas mileage has improved.

Why does my Chevy Silverado 1500 not start?

I have a 2005 Chevy Silverado 1500 2 wheel drive 4.3L V6. I recently replaced the fuel pump because the truck would not start. Replacing the pump fixed the problem, but now its doing the same two mouths later. Cranks but will not start. Yesterday I left for work the truck started and ran for about four miles and then it just quit.

What was the name of the first General Motors van?

The G20’s low cost of upkeep, size, and options have made this van popular with all different kinds of trades, from plumbers to caterers. The first General Motors van was the Chevrolet Corvair -based Chevrolet Greenbrier van, or Corvan introduced for 1961, which used a flat-6 opposed rear engine with air cooling, inspired by the Volkswagen bus.

What kind of engine does a GMC G30 have?

Two GVWR models are offered in G30 heavyweight, one at 7,100 pounds and the other at 8,600 pounds. 8,600-pound model has a 5.7-liter V8 with automatic transmission and 4.09 axle as standard. Only a 125-inch wheelbase is offered in the G30 series, and heavier duty front and rear springs.

What kind of engine does a G20 Sport van have?

In the G20 Sportvan series, basic characteristics are identical to those of the G20 van: 6,600-pound GVWR, same base and optional drivetrains, same suspension, tires, brakes, and steering. 125-inch wheelbase is offered, andwith the 5.0-liter v8, onlyan automatic transmission only and either a standard 2.56axle ratio or optional 2.73:1 ratio.

How to troubleshoot an overheating Chevrolet 350 engine?

Twist off the radiator cap after allowing the engine to cool, then look into the radiator to observe the level of antifreeze. Pour antifreeze into the radiator until full if necessary. With the radiator cap off, start the engine and look through the radiator opening while the engine warms.

Why does my Car start intermittently after starting?

In this case, it’s important that you contact a mechanic as soon as possible so they can determine what is causing the intermittent contact. In many cases an intermittent starting problem is linked to a bad wire connection that may become dirty due to exposure under the hood.

What causes a car to have a no start problem?

A blown fuse in the starter circuit could be the cause of a no-start problem. Broken or corroded wiring – Damaged or dirty wires to the battery or to the starter solenoid (or wires that are loose) can prevent sufficient power from reaching the starter.

How to check your GMC Sierra 1500 transmission?

An the TCC solenoid the signals from the power control model tells it when to shift check the Orange an yellow wire on the harness that connects to your driver side fire wall. 12volts to transmission to carry proper current 89 people found this helpful. Any questions or need of repair please call 5

What is p / n 10456607 on a Chev k1500 350 Vortec?

If this code is stored, the Crankshaft Position Sensor, P/N 10456607, MUST be replaced and the remaining components inspected for damage (engine block at the starter boss, the starter drive housing, and the engine flywheel starter ring gear). Hi guys I am back look at that it has been a year.

Can a 1997 Chevy c1500 5.7L start?

1997 Chevy C1500, 2WD, 5.7L won’t start – cranks fine. No codes – good fuel pressure ( 60+ psi – new pump), good spark, 1997 Chevy C1500, 2WD, 5.7L wont start – cranks fine. No… It will not start. I changed the fuel filter and fuel pump It will not start.

Why is my Chevy C / K 1500 not running?

Fuel pump quit working, now headlights aren’t. Battery has 13.1v in it. Cranks over and starts with ether, but no gas. I thought fuel pump was out so I bought a new one but haven’t tackled dropping the tank. Watched a youtube video about weak battery causing fuel pump to not work. So I started checking. I put in a new fuel pump relay.

What kind of truck cranks but won’t start?

Truck cranks but won’t start – 1997 Chevy C1500 chevrolet… I have a 1997 Silverado with the 4.3 vortec motor. About 2 weeks ago my son was driving it and the way he explained it was the engine completely died on him, causing his guages to malfunction and his steering wheel to lock up.

Can a 1999 Chevy c1500 / k1500 start?

Hi, our 1999 CHEVROLET C1500/K1500 is having the same issue. After sittiing for a few hours, we have to crank it and eventually put a little gas or tarting fluid in the throttle body for our truck to start but runs and drives fine once it does start and will start right up after only sitting for about an hour or so. 205 people found this helpful.

Is the silveradosierra 4.3 running rough again?

Not real bad but wouldn’t idle rock steady like it had been lately and a little hard to start. Then, on Saturday, it happened again. On the expressway at about 70 and it just starts bucking, misfiring, backfiring out of the blue and can’t get above 45mph. Pulled over, checked the air filter (which is almost new). Took it out and tried again.

How long has my Silverado Sierra been running?

We have had it for about 9 mos and put about 7k on it. Last week it started randomly stalling/dying, most times starting right back up. Then it died on my son and wouldn’t start. NO engines popping up. When I got to it I tried to go through the basics of troubleshooting- Turned on key to listen for fuel pump, pump came on.

How long does a Chevy 4.3L Vortec engine last?

3 vortec is a very strong and reliable motor, proven by it being the longest lasting production vortec engine. Generally, these engines are extremely capable of lasting up to 300,000 miles.

What to do if your Chevy 1500 won’t start?

The passlock sensor voltage reading has changed & you can relearn it to the PCM & you can start the truck again. To relearn, turn the ignition key to the on position for 3 10 minute cycles, turning the key to the off position for 5 seconds after each 10 minute learn.

Why does my TRCK not start without starting fluid?

What? well my trck will not start up unless i spray some starting fluid in the tbi, but one its on on it runs great with no problem. i just changed my fuel filter, injector and did a tune up on it what can it be. Click to expand… fuel pump man, these things quit alot… has the truck sat for a while?

Why does my car not start when I Crank It?

The Eye is watching you!! does it eventually start if you keep cranking it? if it starts eventually on it’s own, then you have a ever so slight leak losing pressure as it sits overnight. not enough to lose gas just enough to lose pressure when it sits for long periods. My car does that…I figure it give me time to pressurize the oil system.

What happens when there is no power to the starter motor?

If there’s no power to the starter motor but power everywhere else you’d hear a “click!” noise when you turned to start but nothing else – ie. no whirring or cranking noises.

What causes a car to act like it has a bad starter?

Problems that might cause your car to act like it has a bad starter solenoid can include: Bad battery – If the battery voltage is low it will be unable to provide enough power to start your engine. Blown fuse – Sometimes the simplest explanation is the best one.

What should I do if my starter won’t start?

Solution #2 (Chevy applications): Confirm the mounting block of the starter is attached to the engine correctly. Often, these blocks are installed upside down, making it impossible to achieve the correct starter position. If playback doesn’t begin shortly, try restarting your device.

Why does my starter not fit with my engine block?

If you have a Chevy engine block, make sure your starter has the correct bolt pattern for your engine. Problem: Starter does not fit with my headers. Solution #1: For starters with “clockable” mounting blocks, you’ll need to experiment with the different mounting positions.

Why does my Dodge Ram 2500 not start?

While there are a variety of reasons your Dodge Ram 2500 won’t start, the most common 3 are a dead battery, an alternator problem, or failed starter. How is a no-start diagnosis fixed?

Can a 5.7 Hemi engine crank no start?

If the voltage returns to 5V while the coolant temp sensor is disconnected then you know the sensor is shorted. Try disconnecting the coolant temp sensor and cranking the engine to see if you have spark at one of the coils. For your question about the extra ground, yes, it is always good to have a soild, reliable ground.

Can a 2003 Cummins have a hard start?

One of the most common calls we get are from customers with a 2003-2007 Cummins that have developed either a hard start or no start condition. In order to help out, we had our very own Tyler Lucas, put together this step by step tutorial that you will hopefully find insightful.

What to do if your ram wont start?

Need to get ahold of a scan tool and checl RP ETC. But also u can check the fprv on top of the rail undo the bolt and see if fuel is comin out could be that ur passin fuel thru the rail if not my next next would be question the injectors

Can a PassLock system failure cause a no start?

Passlock system failures are a very, very common cause of no start conditions. OK, the list of possible things that can go wrong looks pretty long but it is rare to see (or have) two different components go bad from two separate systems at the same time.

Can you test a Ford 4.6L in no start?

Testing a cranks but does not start condition on your Ford 4.6L, 5.4L car, pick up, van or SUV can leave you scratching your head and wondering where to start and/or what to test. Well, I can tell you that testing a no start doesn’t have to turn into a nightmare and that you can save money by testing certain components before replacing them.

What does it mean when Chevy Express won’t start?

The first and most common is when it won’t turn over. This just means that the engine doesn’t move when you turn the key. The second way that your Express won’t start is when the engine turns when you engage the starter, but it won’t fire and run on its own.

Why is my Push Start button not working?

On 2010 Hyundai Genesis and Coupe models, the cause of an intermittent no-start problem with the push start button usually turns out to be a defective brake pedal switch. The switch is not telling the system that the driver is depressing the brake pedal when the driver tries to start the engine.

Where to check for no start fuel pump?

The first thing you want to do is check the fuse panel to see if the fuse is blown. If your car has two fuse panels than the one in the engine compartment; should be the correct one to check. The fuse panel or circuit box is usually located near the battery; and is a small black box with a removable lid.

What causes a car to not start with no gas?

Problem may be at wiring connector on top of fuel tank (hard to reach!). No gas in fuel tank (Check the fuel gauge, and keep in mind the gauge may not be reading accurately). Bad gas (Contaminated with water or too much alcohol or diesel fuel). If you just filled up with gas and now your car won’t start, suspect bad gas.

Why does my car not start when I plug it in?

If the starting, charging and fuel systems are working, the problem could be inside the engine. A broken timing belt, timing chain or timing gear means you can crank the engine until you drain the battery, and it still won’t start.

Can a blown fuse cause a starter to not start?

Blown fuse – Sometimes the simplest explanation is the best one. A blown fuse in the starter circuit could be the cause of a no-start problem. Broken or corroded wiring – Damaged or dirty wires to the battery or to the starter solenoid (or wires that are loose) can prevent sufficient power from reaching the starter.

Why does my Toyota Prius not start up?

If you get no lights and your battery is working, the ignition switch could be to blame. If you get dash lights, then turn the key to start to see if the lights go out on the dash. If the lights go out, your ignition switch is okay. Starter Connection – Corrosion on the starter can keep the car from starting.

Why does my GMC Sierra 1500 not start?

Happened before, I gave it air, it started, thought bad filters, then noticed no umph in acceleration, leads me fuel line or bad plugs, not burning fuel. Checked carb, It’s not wet this time, leads me to fuel.

Can a Chevy Truck turn over but not start?

I replaced the starter, have checked the battery and even jump acrossed the starter, which did make it turn over but not start, but I cannot get the truck to turn over with the ignition switch. Is there any way to test the switch? When I turn it to the on position everything seems to work. When I try to start it nothing works.

What to do if your GMC Yukon Denali won’t start?

48 people found this helpful. I have a 2000 Gmc Yukon denali, 5.7 litter, it cranks but won’t start it does have spark in coil, but No spark in #1 sparplug I put new distributor and new coil new sparplugs, new plug wires,checked out fuses there all good]

What makes a Chevy 1500 turn over and stall?

What happens is the passlock sensor creates a certain voltage reading under 5 volts & the PCM has to learn that voltage or it will start & stall until it does. The passlock sensor voltage reading has changed & you can relearn it to the PCM & you can start the truck again.

What kind of engine does a 99 Yukon have?

My 99 Yukon with Vortec 5.7L suddenly won’t run. It cranks over fine, starts in about 1 second (normal), but then dies 2-3 seconds later. Giving it a little bit of throttle while starting doesn’t make any difference.

Can a Chevy C / K 1500 run without fuel?

Also I haven’t fully checked the Spark, but the Truck run’s fine when you spray Starting fluid into the Throttle body. Any suggestions on why the truck isn’t accepting the fuel, it cranks fine, just wont run without starting fluid. these trucks have to have between 55-65psi of fuel to run.

Why is my GMC Sierra 1500 stalling and dying?

There is no code given. Have changed the injectors, timing, fuel tank, fuel pump, fuel pump, map sensor, cooling temp sensor on front of block, rebuilt the tbi, air idea valve. None of this hasite helped. The truck starts and dies. Have to give a little gas to keep running. While driving have to 2 foot it so it won’t die.

Is there a GMC Sierra that won’t start?

I have a 2010 GMC Sierra 2 door pick up that won’t start ans is saying to service theft deterant system. I replaced the battery and the truck started and ran fine. No it won’t start again. Any ideas?

What is a typical GM starting system wiring diagram?

Click on the image here to pull up a PDF of a typical GM starting system wiring diagram. Depending on the year, model and engine of your GM vehicle, your starting system may be less complicated or use only some of the components shown here. For example, earlier anti-theft systems didn’t communicate the same way with the PCM.

What happens if there is no spark in the ignition?

The ignition system is the one responsible for creating and delivering spark. Without spark, the engine will Crank but Not Start. The ignition system of the GM vehicles covered by this article use a distributor type system. Distributor cap. Crank sensor. Ignition module. Ignition coil. All of the above ignition system components can be tested. 2.)

Where does the spark come from in a car?

The spark created by the ignition coil is fed to the distributor cap by a high tension wire and from there to each engine cylinder by a spark plug wire.

Can a bad ECM cause a car to not start?

Of course, there are other reasons a car may not start, including a bad starter or a blown alternator. If you’ve replaced these parts and your car won’t start, your ECM is the most likely cause. Once again, you’ll need to take your car to a mechanic to be sure.

Why does my Chevy Silverado not start up?

Others involve the ignition switch itself, and others involve one of the computers that the system communicates with when starting the vehicle. The security system may have a number of issues, including the installation of a remote starter, causing the car or truck not to start. Most complaints involve a blinking security light.

What was the ignition module for a 1996 GMC k1500?

1996 GMC K1500, K2500, K3500 Pick Up. All of the information you need to diagnose a misfire or a no-start problem (caused by the ignition coil, the ignition module, or the crankshaft position sensor). Wiring diagrams.

What happens when you crank but no start?

Won’t pass the state emissions test. Cranks but doesn’t start. To successfully diagnose a Misfire or No Start on your GM car (pick up, van, SUV, or mini-van) it’ll help to know how spark is created and fed to the engine cylinders. This is what happens, in a nutshell, when you turn the key and crank the engine:

Why does my 1995 Jimmy car not start?

Last spring my fuel lines sprung a leak on a 1995 Jimmy. The Jimmy was running at the time. So I waited till October to replace them. After replacing them the Jimmy wouldn’t start. It turned over really good though.

How to check no injector pulse no ICM signal?

They’re all basically the same. Clear the DTC – Crank the engine and see if it resets – (it does) – Check for a signal from PCM to ICM (no signal present) – Check signal circuit for short to ground or short to power (no in both cases) – Good continuity on the circuit from PCM to ICM. The flow chart says to replace the PCM.

What causes a CPI fuel injector to fail?

The most common type of failure in the CPI ‘Spider’ fuel injector system is usually fuel leaks (inside the intake manifold plenum).

What kind of signal does a GM injector pulse have?

Purple/white wire with key on had barely any signal at all. Wires to the injectors have 12v with key on. I have fuel at the rear of the tbi but not sure of the pressure?

Why is there no pulse from the injector?

Used all original electronics and tbi. New wires, plugs, cap, rotor, fuel filter,etc… have spark, have fuel at the back of the tbi. No pulse at all from either injector?

What are common reasons my GMC Sonoma won’t start?

What are common reasons my GMC Sonoma won’t start? While there are a variety of reasons your GMC Sonoma won’t start, the most common 3 are a dead battery, an alternator problem, or failed starter. How is a no-start diagnosis fixed?

What kind of engine does a GMC Sonoma have?

It boasted of an engine that can reach 150 hp. It also featured a hydraulic clutch system which made it a good choice as an off-road vehicle. In addition, at this early stage, serpentine belts already drive the vehicle, making the engine run smoother together with the other truck functions.

Where can I find GMC Sonoma car parts?

GMC Sonoma parts can be found virtually anywhere. It is also good to notice that they are infused with high-grade quality to keep them in tune with GMC’s great engineering job with the Sonoma. Using inferior products may cause further damage; it would be best to use top grade parts.

What should spark plug gap be for’93 4.3?

Well,I wiped the grease & grime off the catalyst sticker attached to my fan housing,and the plugs should be gapped at .045 (’93 4.3/5sp). so its back under the hood I go! Well,I wiped the grease & grime off the catalyst sticker attached to my fan housing,and the plugs should be gapped at .045 (’93 4.3/5sp). so its back under the hood I go!

What should compression reading be on GM 4.3L?

When performing an engine compression test, what you’re looking for is an average compression reading of less than 90 PSI across all or the majority of the engine cylinders. If you have one or just two readings that are under 90 PSI your GM vehicle will still start and run, albeit with a misfire condition.

How to replace the ignition switch on a GM car?

1. Insert ignition key and turn to the “ON” position. Do not attempt to start the engine. Leave the key in the “ON” position for approximately 11 minutes. The security light will be steady on or flashing for the 11-minute period. Do not proceed to Step 2 until the security light turns off or stops flashing. 2.

Why are my head gaskets on my Duramax truck failing?

One of the common issues we see with the Duramax engines is head gasket failures. The gaskets in all years of 6.6 Duramax pickups are a multi-layer steel style gasket. Over time as the head/block surfaces warp and the strength of the head bolts weaken, the head can lift causing combustion pressure to go directly into the coolant system.

Where can I get a new head gasket for my diesel truck?

To get the down low on replacing head gaskets the right way, we tagged along with Jason Carrier at Xtreme Diesel Performance in Chico, California, to see how it was done. The truck in question was a ‘04.5 LLY, which thanks to heavy towing and a hefty tune, was in need of a new head gasket.

Why do I need to replace my head gasket?

This is a common failure on higher horsepower engines that create cylinder pressure that overcomes the clamping load of the stock head bolts allowing the head to lift. Almost anytime you have a head lift even just once, you have compromised the integrity of the gasket and you will need to replace it.

Why did my head gasket blow on my LLY?

While all iterations are fairly reliable, the older ’01-’04 LB7 engines and ‘04.5-’05 LLY’s are starting to show their age. Blown head gaskets are fairly common in these earlier year trucks, as wear and tear, aftermarket tuning, and high mileage are all contributing factors to failure.

Why does my car run after I start it up?

One potential problem that could arise is the inability to control the fuel injection system correctly. This might cause problems keeping the car running after you start it up.

Why is my car starter not working properly?

Problem: Starter does not engage or disengage properly. Solution #1: Due to variances in design between manufacturers, you may need to install or remove starter shims between the starter mounting block and engine.

What does it mean when your GMC Sierra won’t start?

The first and most common is when it won’t turn over. This just means that the engine doesn’t move when you turn the key. The second way that your Sierra won’t start is when the engine turns when you engage the starter, but it won’t fire and run on its own.

How often does the GMC Sierra come out?

Their four generations have appeared every five to seven years: 1999 to 2007, 2007 to 2014, 2014 to 2019, and 2019 to the present. Here’s a look at some of the most common problems the GMC Sierra has had over the years.

What to do if your GMC Sierra stall out?

69 people found this helpful. I have a 98 gmc searria 4×4 i checked fuel pressure it was under i changed fuel pump and fuel filter and its still starving for fuel what to do it starts with starting fluid 42 people found this helpful.

Why does my GMC Sierra 1500 not work?

While there are a variety of reasons your GMC Sierra 1500 air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. What will be the outcome of an air conditioning system diagnosis?

What was the problem with my GMC pickup truck?

Specifically, the lawsuit claimed the active fuel management (AFM) system, piston rings and PVC system in these vehicles were faulty and caused excessive oil consumption, as well as premature spark plug degradation and engine malfunction.

Why does my GMC Sierra suddenly stop running?

Truck suddenly stops running, acting like it’s out of fuel. There is fuel in the gas tank and, I can hear the fuel pump when I turn the ignition on. Is there a fuse, or relay that is maybe causing this to happen?

What to do when your car won’t start after driving?

Problem start after driving car no mather about distance, after turning off engine and passing few minutes car wont start. Have oto keep it cooldown in order to turn on engine again. Even sometimes but rarely engine turnes off without any reason and after a few minute I was able to start engine again.

Why does my GMC Sierra 1500 say service 4WD?

Having similar issues as above, had to drive the truck in 4wd high for a short period of time without the rear drive shaft, heard a clunk and the service 4wd message came on, the front drive shaft quit which left me stranded.

Why does my dash say service 4 wheel drive?

Service 4 wheel drive in dash indicator comes on and lights go out on the transfer case switch nob. If I turn off the engine and wait for 10 min. then start truck everything is ok. and I can turn nob to whatever location I want and it will shift.

What to do if your Jeep won’t start?

Jeep won’t start. One click when key is turned. Confirm that the engine immobilizer system (security system) is not activated thus preventing the car from starting. If the immobilizer system is on, you may see a security warning light.

What kind of engine won’t start unless you spray starter fluid?

Cars A-Z Engine will crank but won’t start unless you spray starter fluid in it Maintenance/Repairs dodge, ram1500 Ramprobs October 11, 2016, 7:27pm #1 Okay so I have a 2004 Dodge Ram Hemi, the truck was running fine all this weekend and was fine this morning.

What causes an engine to backfire after months of use?

For example, a spark plug gap may widen after the plug has been in operation for months and make it difficult for the spark to jump. Also, carbon buildup may isolate the electrodes, preventing proper combustion. Unburned fuel then is allowed to pass into the exhaust system where it can backfire.

Can a bad sensor cause an engine to backfire?

An engine sensor malfunction can also lead to backfires. Take for example a bad mass air flow (MAF) sensor. The engine computer uses this and other sensors to compute the amount of fuel to inject into the engine according to operating conditions.

Why does my Chev k1500 350 Vortec backfire?

When I hear backfiring, can only think about ignition problems, with rich fuel problems and good ignition, shouldn’t backfire, but will see black smoke from the exhaust. With erratic ignition, if the spark does come, can come at any time, even the wrong time, and if the intake valve is opened, it will backfire.

Why does my Chev 350 Vortec not start?

Cold air is dense and spark goes through it harder. Give big ass GM gaps spark plugs and bingo, all secondary spark is crap. Guy came back today with his truck. Busted a brake hose, but he says gas mileage got better since tune-up and injector cleaning. Gas filter was done at tune-up also.

What to do if your fuel pump won’t turn over?

Replaced fuel pump turns over like new but won’t start fu… Replaced fuel pump new engine but still won’t turn over what else could it be My car has 157000 miles. My car has an automatic transmission. Of course, confirm that the engine immobilizer system (security system) is not activated thus preventing the car from starting.

What causes a fuel pump to not ignite?

If there is fresh fuel being delivered by the injectors (not just “to” the injectors) and the ignition system is working, that means that the air fuel ratio of the mixture delivered to the cylinders is so far off that the mixture just won’t ignite.

There are a lot of issues that can cause your Sierra to crank, but not start. The engine needs air, fuel, and a spark in order to run. It is highly likely that if the engine is cranking, but not starting that it has thrown an OBDII code.

No one has added a helpful site for this 2000 Silverado problem yet. Be the first! Read reviews of repair shops in your area. Enter your zip code: NewRockies.com: How to fully bypass VATS, PassKEY and PassLock systems in GM cars.

Why does my fuel pump not start when I change it?

You always want to replace the fuel filter when replacing the fuel pump. This could cause the concern you are having. It may seem as you are getting enough fuel from the pressure regulator but if the pressure from the fuel tank is not correct, it will still not start. Another problem you could be having is spark.

What should I do if my GMC Truck won’t start?

Replace the ecm, crank position sensor, all the relays I could find and fuses for ign. Have power to the coils but no spark and fuel is also good any help would be great. maybe it has low fuel pressure? How can I check the pressure? Is it possible to remedy the fuel pressure issue short of replacing the fuel pump?

Why does my GM car say no crank no start?

For example, when you operate your remote keyless entry fob, it’s normal for the dome lights to turn on. If you’ve replaced the dome light bulb with an LED style bulb, the new bulb may emit an RF signal that jams the security feature of your GM vehicle so it can’t recognize your key, causing a no crank, no start condition.

Why does my GMC Yukon have no start?

The anti-theft system may fail causing a no start condition, the security light may illuminate. Our technicians tell us that the ignition switch may need to be replaced to correct this fault. Ready to sell? CarMax buys all kinds of cars RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide.

What was the ignition module for a 1996 GMC c2500?

1996 GMC C1500, C2500, C3500 Pick Up. 1996 GMC K1500, K2500, K3500 Pick Up. All of the information you need to diagnose a misfire or a no-start problem (caused by the ignition coil, the ignition module, or the crankshaft position sensor).

How to troubleshoot a GM 4.3L no start?

Check that the 8 cylinders are getting spark with a spark tester. The distributor cap is good. The ignition coil is good. The ignition control module is good. The crankshaft position sensor is good. The distributor cap could be bad. The ignition coil to distributor cap high tension wire could be bad. The ignition coil could be bad.

What kind of truck won’t start or fire?

I have a 1997 Chevy Z71 just put new trans in drove for about 20 miles and the truck just died………Replaced fuel pump, Fuel relay and found that the fuel fuzz blows every time I turn key on ???? 24 people found this helpful. 22 people found this helpful.

Why does my Chevy Silverado not turn over?

Have a 99 Chevrolet 4×4 Silverado with 5.0 it was hot wired by previous owner. It did crank but replaced the steering wheel column with new wires and now it will turn over but won’t start. The fuel pump is connected directly to the battery.

Why does my truck not start when I turn it off?

When you turn an engine off, as it approaches its final stopping point it will turn backwards a few degrees from hitting engine compression. If you have a worn-out timing belt, that backwards motion can shear off a few belt teeth, causing your truck not to start next time.

Do you need a PCM for a GM car?

Depending on the year, model and engine of your GM vehicle, your starting system may be less complicated or use only some of the components shown here. For example, earlier anti-theft systems didn’t communicate the same way with the PCM. The bottom line is you MUST get the wiring diagram for your particular vehicle.

Can a GMC Jimmy start in the Cold?

I have a 1999 GMC Jimmy with a 4.3 vortex engine and it won’t start in the cold or wet, rainy weather.

How to test the GM ignition control module?

You can find this tutorial in Spanish here: Cómo Probar El Módulo de Encendido GM 4.3L, 5.0L, 5.7L (1995-2005) (at: autotecnico-online.com ). Generally, when the ICM or the ignition coil fails, your GM car or truck will Crank but NOT START.

Why are the brake lights not working on my P30?

Doubt it is bad with your other problems. The tailights, four way flashers and brake lights are or should be hot all the time. that elimantes problem with ignition switch. Sounds like there is no power to the fuse for the tailights and no power from the stop/hazard fuse.

Is there a problem with my Sonoma V6?

Ok, I have V6 in my 2000gmc sonoma that will not crank when attempting to start. The dash lights up, under the dash clicks (normal sounds) are there, under the fuse box relays click as well but no sound at all coming from solenoid or starter.

Why does my 1999 Chevy S10 not start?

That truck is known for ignition switch failure, not the key one but the electrical switch at the lower column. 1999 Chevy S-10 PU 4.3 ltr. engine, won’t start when wet, once it dries out and the weather clears it will start. We’ve replaced cap, rotor, plugs, fuel pump and fuel injectors.

What are the symptoms of a bad starter relay?

Listed below are a few of the symptoms of a damaged or worn out starter relay. If you notice these warning signs, make sure you contact a local ASE certified mechanic to completely inspect your vehicle as these symptoms might indicate problems with other components. 1. Vehicle does not start

What to do if your GM charger is not working?

If you have GM charging system problems, you must first understand how they work. Plus, you must use a scan tool to determine the root cause. Otherwise you’ll be replacing parts unnecessarily. The new GM charging system is actually called the electrical power management system.

What causes no crank or no start condition?

Sometimes, parasitic drain exceeds what is normal, and can cause car battery drain. Because of the BCM’s communications with other modules and components you may experience a no crank or no start condition. In many cases, your BCM will alert you to issues with symptoms, warning lights or both.

How often does my GMC Truck turn over?

So far this has been the case pretty much every time i am starting the truck cold. I’ll try to start it and it will turn over for about 3-4 seconds (have tried a bit longer, still no go) then i’ll stop and try to start it again, and the second time it fires right up.

Where is the fuel pump sensor on a GMC Truck?

Its located on the drivers side of the throttle body. Its the top sensor. Try turning your key to the run position a few times (with out starting). Then try to start it. If it starts, sounds like what mine did. I replaced the fuel pump assembly and that fixed the problems.

Why does my car not start when I crank the engine?

The crankshaft position (CKP) sensor monitors the position or rotational speed of the crankshaft. If the crankshaft position sensor has failed completely, and isn’t sending a signal to the (ECU) at all, then the computer won’t send any fuel to the injectors. This will leave you unable to start the car.

What kind of Chevy truck won’t start?

In this video we encounter a condition where a 2002 Chevy Silverado ( Similar to GMC Sierra ) pickup has a symptom of the engine cranks over but won’t start…. In this video we encounter a condition where a 2002 Chevy Silverado ( Similar to GMC Sierra ) pickup has a symptom of the engine cranks over but won’t start….

What to do if your Chevy Express won’t start?

It sounds like it’s trying to start but won’t. The key only comes out in vans that are equipped with the V.A.S.T system. Weirdly banging on the dash sometimes works too. If it does not try to start for a second and then die, replace the cap and rotor. This video is about an issue involving the disabling of the fuel pump for security. Loading…

How to troubleshoot a no start GM 4.3L pick up?