Why is the Check Engine light not working?

If the ECU can’t get a clear signal, the engine may fail to start or die immediately after starting. Your ECU should throw a check engine light if there is no signal from the crankshaft or camshaft position sensors. Get this code read if you can, as it may tell you the exact wire that is causing the issue.

Why does the battery light come on after starting the car?

Because of the towing running 24/7 most usually have someone that can repair cars available even on holidays. You can also check the wires going to the alternator, you will have to jack up the car because it’s on the back side of the engine on the bottom.

What causes engine rpm to drop at stop light?

engine rpm drops or stalls at stop light on abrupt braking. Hi there. In many cases, the issue you’re talking about is caused by an ignition timing problem; typically related to a damaged crankshaft position sensor or trouble within your ignition system such as the coil or distributor.

Why does my car stop at a stop light?

When stopped waiting at a stop light, the engine RPMs will drop a bit and it sometimes stalls out. This is a common sign of a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and…

How to reset check engine light, free easy way?

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

Check the fuel filter service interval in your car owner’s manual or repair manual. If the fuel system uses an in-line filter: Remove the filter. Blow through the filter in the direction of fuel flow. If air goes through with difficulty, or not at all, there’s your problem When necessary, use a fuel pressure gauge to check system pressure.

Where do I find the Check Engine Light code?

Then, press the “read” button on the scanner to access the check engine light code. The code will be a series of letters and numbers. Record all of the codes so you can figure out what they represent and make the necessary repairs to your vehicle.

Can a check engine light go off by itself?

Will the check engine light go off by itself? Yes, The check engine light will reset itself after a fixed amount of time if you fixed the problem in most car models. Usually, this is 10-30 cycles. One cycle is from a cold start until the engine is at working temperature.

What does the engine start / stop switch mean?

The light is green: This means the engine is running or is ready to be started. The light is flashing green: This means that the steering wheel lock is not released. The light is flashing amber: This means there may be a problem with the system and you need to have the car inspected immediately.

What does the check engine warning light mean?

The check engine light will usually come up in an orange, yellow or amber colour depending on the manufacturer, and a flashing light usually means there is a more serious issue. A flash when starting the car isn’t an issue, it’s just a check by the ECU to make sure the system is working. Can I just ignore a check engine warning light?

What should I do if my car won’t idle?

Step 8: Press the accelerator pedal to the floor and count for 10 seconds and then release the pedal for 10 seconds. Do this 2 times Step 9: Quickly press the accelerator pedal to the floor and then release three times. Step 10: Start the engine. If it does not idle correctly after this procedure, you will need to clean the throttle body.

What causes a car to run lean at idle?

If the root cause is an electrical problem within the idle air control valve itself, you will likely have to replace the IAC. A vacuum leak is a hole in a vehicle’s air intake system behind the mass air flow (MAF) sensor that allows unmetered air into the engine. This throws off the expected air fuel ratio and causes the vehicle to run lean.

What to do if your Toyota won’t start?

Battery – If the connections on your battery become corroded, there is no longer a connection to the rest of the car. This can keep you from starting. Clean the posts and try to start the car. Additionally, the battery may be dead. Take a battery tester and test the cranking amps to see if they are weak.

When do you know you have a MAP sensor problem?

If you can only start the engine when your foot is on the accelerator, you probably have a MAP sensor problem. Hesitation or Stalling. When starting from a stop or trying a passing maneuver, stepping on the gas might not give you any joy, especially if the ECM is giving you a lean mixture based on faulty MAP sensor readings. Check Engine Light .

What to do if your car starts and then dies?

If not, test the MAF sensor to see if it’s gone bad and replace if necessary. If you use an aftermarket air intake, make sure you don’t apply too much oil on the air filter. Excessive oil may blow past the filter and gum up the MAF sensor.

What happens when a GM Truck starts then dies?

It starts then dies immediately. Parts replaced so far: fuel pump, fuel filter, spider injectors, fuel regulator, oil pressure switch, ignition switch, ignition module, passlock, fuel pump relay, spark plugs, wires, distributor cap, rotor and ignition coil. Crank sensor is getting power and 50 psi with key in the on position (not running).

What kind of problems does a Chevy Blazer have?

I have a 1974 Blazer with a 305 in it, I just replaced spark plugs, cap, rotor, wires, fuel filter, some hoses and PCV valve. It starts up strong, runs fine for a bit – drive it around the neighborhood – then once I come to a stop it basically dies on me, sometimes it will start right back up again – sometimes it will just crank and crank.

What to do when your Chevy Blazer wont start?

Aby codes (SES light on) and if so post them. No codes come up until after it happens then it comes up oxygen sensers port 1 and port 2. You can step on the gas and the engine just bogs it has absolutely no power . Put the car in neutral ( while still moving ) count to 3 and restart and have all the power you want.

How does the fuel system work on a Chevy Blazer?

Fuel system has a test port on the metal line that requires a special valve to connect and then ckeck the pressure. 60psi min with key on engine off (start pressure) and 54psi running. If those check out then on to electrical/sensors/etc. Any SES light on and codes?

Why is my Chevy Blazer stalling and stalling?

Check/clean EGR. This does have the newer style injection so could be fuel pump heats up and pressure drops – have to test at test port. Coil could be failing due to overheating due to ignition module never shutting off so always a low voltage to it.

What causes a car to start at the wrong time?

Spark plug wires are a source of electromagnetic interference (EMF), but this is usually only a problem on some aftermarket setups when this interference isn’t taken into account. A timing belt or chain that has skipped a tooth will throw off the cam timing, causing the intake and/or exhaust valves to open at the wrong time.

What causes a car to start and stall?

Check to make sure your spark plug wires or ignition coils are seated properly on each of the spark plugs. A detached or malfunctioning spark plug wire will cause misfires and often a stall as the engine struggles to stay running on fewer cylinders.

Why is the security light blinking on my Blazer?

I had the same problem 2 years ago with my 2000 Blazer. I went through hell trying to figure out the problem with many mechanics. If the security light is blinking you have to wait 10-15 minutes for the system to recycle. When the light stops blinking it will start.

What should I do if my PassLock security light goes off?

If nothing happens or the engine starts and dies, the security light will be flashing. Wait ten minutes. The flashing light should go off or illuminate without flashing. When it does, turn the ignition off, wait twenty seconds, and then try to start the engine. If it starts and runs, everything is okay.

How to reset check engine light with scan tool?

Use A Scan Tool 1 Connect the scan tool to the OBD – II Connecting the scan tool to the OBD- II ( On- board diagnostic connector) under your steering column. 2 View error codes by pressing the “READ” button Pressing the “READ” button on the scan tool to see the error codes of the engine. 3 Remove the error code

Is there a way to clear check engine light codes?

You might have stalling and hard shifting problems for a while after reconnecting the battery. It will usually recover automatically, but it can take several drive cycles for this to happen. An easier way to clear the check engine light codes is to use an auto scan tool. These scanners have come a long way and now include better documentation.

When did they start resetting check engine lights?

Before the deployment of OBD II in 1996, resetting a check engine light was a simple matter. Just disconnect the battery for more than 10 seconds and you’re done. You could even pull the electronic control module fuse on many models. Then OBD II came along. They started rolling it out in late 1995 model year.

Can a check engine light turn off by itself?

Can the check engine light turn off by itself? Yes, sometimes the light will turn off by itself as you drive it around for a while after addressing the issue that made it turn on in the first place. Why does my check engine light turn on and off intermittently? There could be a few reasons why this is happening.

What does it mean when your check engine light is flashing?

However, these other systems may also set a check engine light, at times. Check engine lights also have multiple states. For instance, a check engine light that is steadily on, means a situation exists that requires service soon. A flashing MIL shows a condition that may damage the engine and needs immediate attention.

What does the Check Engine light on OBD2 mean?

Along with triggering the check engine light, the OBD2 system will store a corresponding engine fault code so you can diagnose the issue. Since simply resetting the check engine light won’t fix the underlying issue, you first need to understand what your check engine light means to clear it effectively. What Does Your Check Engine Light Mean?