What causes a Vortec 5.7 hesitation problem?

Problems with the Throttle position sensor, EGR Valve, Idle Air Control Valve, clogged catalitic converters, bad O2 sonsors causing truck to run with it much fuel, bad distributer cap/rotor, spark plugs and wires and a bad fuel filter are all problems that can cause the truck to bog down under heavy acceleration. Loading…

What to do if your Vortec won’t start?

96 Chevy C1500 5.7L Vortec Truck won’t start, Replaced Fuel Pump, Filter & Has Spark. Hey everyone, I have a 1996 Chevy C1500 with a 5.7L Vortec, I got the truck recently and was told it just needed a Fuel pump, I replaced the Fuel pump, and the Filter, also the pump turns on and there is fuel up at the rail, I pushed the pin and it shot right out.

What’s the misfire code on a 1998 Vortec?

Can someone please help with what I should check next, I have a 1998 Chevy K1500 5.7 Vortec with a misfire, P0300 code for 3 months. runs a little rough, while driving under normal conditions it sputters, hesitates, and also will backfire, under heavy acceleration no noticeable skip, no sputters, and does not hesitate or backfire.

Why does my Chevy truck sputter when I accelerate?

The engine starts and runs fine, when I leave for or from work. But when I accelerate out of the parking lot it hesitates and really sputters. If you try to accelerate more it backfires a few times and then takes off like there’s nothing wrong.

Why does my Chevy 2500 run out of gas?

Thanks. Chevy 2500 4×4 truck,, wont excelarate right, acts like its running out of gas, good fuel pressure, new mass air flow senser, still does it… any ideals??????? It can be fuel pressure issue or it’s the problem with accelerator pedal or its clogged filters causing there.

What to do with a 98 Chevy 1500?

I want u to clean the air intake valve and idle speed control valve, follow the procedure below.

What causes a Vortec engine to leak fuel?

If this engine is a VORTEC then you may have a problem with the internal fuel system. Under the top plenum there is a fuel reg and poppet valves that inject fuel into the cylinders. Sometimes the tubes that run fuel from the reg to the valves can leak and cause your problem.

What’s the fuel pressure on a 97 Chevy?

There are two different fuel pressure specs for this vehicle. Central SFI 60-66 psi SFI 56-62 psi If you are not experiencing any drive ability issues, then I would not worry about. IF it is still hard starting, then I would try adding some fuel or starting fluid ot the intake to see if she fires right up when this happens.

Is the Chevy Silverado 5.7 Vortec engine rock solid?

I could be wrong but I thought that 95 was the last year for the 5.7 NON Vortec engine and that when Vortec’s came out in 96 were all 5.3. I have a 95 with the 5.7 350, not a Vortec, my mechanic tells me that is a rock solid engine and I should be able to get 300,000 out of it with regular oil changes.

What kind of engine does a 1997 Chevy Vortec have?

1997 Vortec Engine Specifications. The original Chevy Vortec engine was built in 1986, a 4.3 L V-6 engine. The 7.4 L 7400 V-8 Vortec engine was produced from 1996 to 2001 and was a fourth-generation Vortec engine. The Vortec technology comes from the word “vortex.”.

When did the 5.7 Vortec engine come out?

I could be wrong but I thought that 95 was the last year for the 5.7 NON Vortec engine and that when Vortec’s came out in 96 were all 5.3. Yep you are wrong! I had a 97 with the 350 in it. Good truck. Some of the 350’s in that vintage had crankshaft bearing journal issues.

What kind of engine is in a Vortec 5700?

The Vortec 5700 L31 (Vin code 8th digit “R”) is a V8 truck engine. Displacement is 5.7 L. It is the last production Generation I small-block from Chevrolet. The cylinder heads feature combustion chambers and intake ports very similar to those of the LT1 V8, but without the reverse-flow cooling. 19 people found this helpful.

Is there a spark plug in a 5.7 vortex?

But a 5.7 vortex has an spark plug wires an a cap. A ls engine has coil packs over each cylinder. So pretty easy to spot. Along with a few others but that one is the quickest an easiest way to spot it an call him out on it.

Why is my GMC Vortec engine not running?

Specis 60-66psi at Key On ENgine Off (KOEO) Key On Engine Running will be slightly less. Could be a vacuum leak, take some brake cleaner and spray it around all selaing points of the intake. If the engine idle changes, you have an issue. Make sure the a/c and blower are in the off position so the compressor doesnt cycle.

What’s the name of the Chevy C / K 1500?

Chevrolet C/K 1500 Questions – 98z71 5.7 multiple misfire P0300 fouling 1 3 5 7 plugs with gas what c… – CarGurus only on that side… try and go up 2 heat ranges on that side,,,and / or first .. take some good pictures of those plugs and post them…

What kind of engine does a GMC pickup have?

This engine was designed as a direct replacement for 1996-2000 Chevy & GMC pickups, SUV’s, and van applications. These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency.

Where are the V6 and V8 located on a Chevy Vortec?

On the 1996-1999 chevy/gmc vortec engines both v6 and v8 are located in the front of the timing cover just right of crank but behind the vibration dampner weight.

Is the Chevy 5.7 liter Vortec remanufactured engine online?

Remanufactured engines are put through a number of processes to allow a long and reliable built of your engine. With high production volumes, Accurate Engines is able to offer the Chevy 5.7L engine online at drastically reduced rates. Our 5.7 liter Vortec Chevy remanufactured engine comes with a 100,000 Mile Nationwide Warranty.

Where did the 1998 GMC Sierra 1500 come from?

1st owner purchased on 02/15/97 and owned in FL until 09/15/16 • 2nd owner purchased on 09/15/16 and owned in FL until 08/18/20. 1st owner drove an estimated 12,395 miles/year • 2nd owner drove an estimated 2,736 miles/year.

How is the Chevy k1500 Suburban engine rated?

Rated 4 out of 5 by joe shadetree from 99 Chevy K1500 Suburban “Motor not ready to run” Had a couple of minor issues as to why 4 stars, Jegs and ATK customer service are excellent and helped every way they could. I recommend checking compression on all cylinders, verifying top dead center on #1 cylinder and lash on valves prior to install.

What is the acceleration of a Vortec 5.7L?

When I accelerated, it went up (?) to -33 degrees. When the hesitation hit, it dropped to -20, -12, even as low as -4 degrees, only to instantly go back to -33 when the hesitation stopped. Remember that this hesitation lasts only about 1.5-2 seconds.

What should I do if my Vortec engine wont start?

Gauges are $20. Specis 60-66psi at Key On ENgine Off (KOEO) Key On Engine Running will be slightly less. Could be a vacuum leak, take some brake cleaner and spray it around all selaing points of the intake. If the engine idle changes, you have an issue.

What causes car engine to hesitate when accelerating?

The exhaust gas recirculation valve, or EGR valve, may be damaged and causing a leak. This is known to cause engine hesitation problems, so it should be addressed. If you are using bad fuel which is has been sitting in your tank for too long or is too low of an octane for your engine, it can cause many different problems.

Is there a problem with durring light acceleration?

The truck starts and idles without an issue. Durring light acceleration and at low speeds (city driving 35 mph or so) the truck seeems to run fine. However, when accelerating to highway speeds you notice that the truck will intermitantly jerk.

Why does my Chevy 1500 hesitate under acceleration?

Hesitation under heavy acceleration: 1st gear @ 20mph, 2nd gear @ 30mph, accelerates nicely to these points, then abruptly hesitates as if ‘bogging’ down. Have rebuilt throttle body, replace you either have a plugged fuel filter, a plugged converter or a bad mass air flow sensor

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.

What kind of engine does a 1998 Chevy Silverado have?

I have a 98 Chevy k1500 with the 5.7 350 vortec. I have tried everything to get the truck to start. Battery is good. It has good compression, fuel, and fire to the engine. Checked all these last night. still wouldn’t start. Starter is good and fuel pump does engage. Did a tune up on it last year. New

Why does my 1998 Chevy Silverado not start?

Battery is good. It has good compression, fuel, and fire to the engine. Checked all these last night. still wouldn’t start. Starter is good and fuel pump does engage. Did a tune up on it last year. New spark plugs, wires, distributor cap, rotor button. Changed the fuel filter last week. I am completely stumped on what to try next.

How to fix a 98 Chevy 5.7 Vortec?

I had same problem 97 5.7 vortec. Replaced cam and crank sensors repaired wiring to crank sensor, much better. I put it on co. Outer and it said can and crank sensors were not in sync with eachother adjusted timing got it down to 2 degrees, it can be – 2 or +2 but no more than 2 16 people found this helpful.

What to do about no start 5.7 Vortec?

No start 5.7 Vortec – YouTube ECM B fuse blowing 98 Chevy GMC problem found. No start 5.7 Vortec 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.

Is the 98 Chevy 5.7 misfire running right?

I have a 98 chevy 1500 5.7. The truck doesnt run right at all. Msifres bad under acceleration. Idle ok when misses when reving and accelerating. I did a full tune up including plugs, wires, cap rotor and a new distributor. With key on i have about 60psi fuel pressure but idleing i only had 50psi.

What’s the idle timing on a Vortec 5.7L?

Much later, when I got back home, the idle timing was -24 degrees, but the driving timing was still usually -33. There were some times that it was mid-20s. When I step on the gas, from a setting of -33, timing changes, very rapidly and of short duration, to around -19 degrees. Then it goes back “up”.

What kind of engine does a Vortec 1500 have?

After letting my 1996 Chevrolet 1500 work truck with 5.7L vortec v-8 and 4L60e trans (203K on the engine, recent rebuild on trans) sit in the driveway for a couple weeks, I hopped in to head to the parts store. And…

Can a GM 4.3L Vortec engine be tested?

This isn’t possible on the GM 4.3L, 5.0L, and 5.7L Vortec engines with a ‘Spider’ fuel injector (the fuel injector is inside the intake manifold plenum and its outside electrical connector doesn’t allow for such a test).

What’s the RPM on a GM Vortec 5.7L?

At very low load, rpm between 1000-1500, it accelerates normally for a couple seconds, then nearly dies for about 2-3 seconds, then “catches up with itself” and pulls hard. Did the same thing for nearly every upshift. When I tried, from a dead stop, to accelerate enough to get the truck moving then floored it, same thing.

What are the O2 readings on a Vortec 5.7L?

The readings from all O2 sensors look correct. The front ones rapidly flucuate from about .12 to .87. The rear fluctuate from about .06 to .18. The TPS shows good throttle position throughout the range. One thing that I’m unsure about is the Long Term Fuel settings. The scan tool showed them at -11%.

How many engine variations does a Chevy Vortec have?

The engine went through two different variations during its lifespan, Gen III and Gen IV. Across both generations the Vortec 5.3 had 10 different engine variations used across the Silverado, Sierra, Suburban, Avalance, Yukon, Tahoe, and a number of other less popular Chevy and GMC vehicles.

What kind of problems does a Vortec 5300 have?

Vortec 5300 Common Problems – 5.3L V8 1 Excessive oil consumption 2 Cracked cylinder head (not super common) 3 Spark plug failure from carbon build-up 4 Intake manifold and gasket 5 Fuel pressure regulator failure

What’s the mileage of a Chevy Vortec 5.3?

Before we dig into the common problems, let’s talk about engine reliability. The Vortec 5.3 is widely regarded as extremely reliable, with most engines having a lifespan within the 200k-300k mileage range.

What kind of engine does a Chevy 5.7 Vortec have?

This is a performance Chevy 5.7 Vortec 350 engine with name brand parts, designed to be a plug-in-and-play to work with factory ECU, injectors, and fuel pressure with no modifications! Fits 1996-2002 full size GM and Chevy trucks and SUV’s with the “R” code engine.

Why is the oil pressure so low in my Vortec?

Raising the engine speed to above 1000 rpm causes the oil pressure to increase to about 45 psi. If the engine speed is increased even more, oil pressure tops out at about 55 psi. Given the mileage on the vehicle, I’m wondering if the lower-than-normal oil pressure at idle is due to internal engine wear.

Why is the O-ring on my Vortec not working?

An O-ring seals the connection between the pump and the pickup tube. Several of these engines have developed problems with the pickup tube O-ring. Some believe the O-ring may be damaged during original engine assembly, while others think the O-ring just wears out over time.

When did the GM 5.7L Vortec engine come out?

General Motors created its 5.7L Vortec in the 1990s. It was designed for use with larger pickup trucks. The huge V8 power was the last of its 350 engine design.

What should the idle speed be on a GMC V8?

A V8 should idle at 500rpm. GoNDown, did you recently disconnect your battery? After I left mine dead in the yard for a while and didn’t charge it, when I started it up it ran like you describe for a few days and then it was fine. I think it was doing a crank relearn (I no longer remember why I came up with that theory, though).

What’s the idle RPM on my Chevy Suburban?

My 1997 Chevy Suburban (5.7) is acting up on me. When I start it up the RPM and idle seem fine. As I let it sit for a couple of seconds the RPM’s slowly begin to drop until they finally bottom out at about 1K. As soon as I put it into Reverse/Drive etc. the RPM’s drop below that mark and it struggles to stay running.

Why does my Vortec engine bog at full throttle?

Second what rebelman said…I had the same exact issue with a 4.3 Vortec I used to have and it turned out to be in need of a simple tune-up. One charred spark plug was causing it.I replaced the plugs, wires and rotor and it ran like a champ after that. It could be many things, but that’s what it was for me.

Why does my Silverado go slower past half Trottle?

The truck starts, idles, and revs normally and when accellarating slowly everything works just fine, but once you get past half throttle it falls on its face and acts like it has a clogged fuel filter or bad fuel pump. It actually goes slower than below half throttle. The bogging gets consistently worse the more throttle you give it.

What causes a Vortec 5.7 hesitation problem?