Why does my car run when the ignition is turned off?

With the ignition turned off and the car continuing to run, simply remove the plug from the alternator (DO NOT TRY AND REMOVE THE BATTERY POWER WIRE FROM THE POWER STUD!) and the car should shut off if the alternator is creating the problem. If it does not stop running, your feedback problem is coming from something other that the alternator.

How does the C4 Corvette start and stop?

Brainiac Fact for C4 Corvette Start Sequence! The ECM also pulls the fuel pump relay which makes the contacts and parallel’s it electrically with the oil pressure switch. This way if the fuel pump relay fails you can still normally get the car to run.

What are the trouble codes for a corvette?

31 LCD data circuit shorted to battery or CCM internal open 33 Data clock circuit shorted to battery or CCM internal open circuit 35 Data strobe circuit shorted to battery or CCM internal open circuit 36 Data strobe circuit open or shorted to ground 37 M clock circuit shorted to battery or CCM internal open circuit

How to clear a CCM code on a corvette?

Clearing the CCM codes can be done after the automatic sequence of codes has occurred with the following instructions: Press the TRIP RESET button until “1.0” is displayed in the module number area. Then press the TRIP/ODO button until “1.7” is displayed in the module number area. Once there, press and hold the ENG/MET button until “—“is displayed.

How to troubleshoot a car that won’t turn off?

Hook up your tachometer according to instructions and check the idle speed. Most four and six cylinder engines should idle around 850 to 900 RPM. Eight cylinder engines may idle around 600. Check your workshop manual and adjust the idle speed according to the specifications. Step 3: Check the anti dieseling solenoid.

Why does my car diesel when I Turn Off the engine?

If the engine idle speed is too high, it may cause the car to diesel after it is shut off. Hook up your tachometer according to instructions and check the idle speed.

What causes a Chevy Impala engine to stall?

Bad gas- can cause an engine to stall out. Water in the gas tank can also cause gas to not fire properly. If there were no other symptoms and suddenly you find that the vehicle is running very rough, bad gas could certainly be the problem.

What causes timing chain jumped in Chevy Impala?

Here’s more on timing chain jumped symptoms. Your Chevy Impala uses a series of complex sensors to report what is going on to the ECU. The ECU then uses this information to adjust the timing, air fuel mixture, and more. When one of them goes wrong, it can lead to stalling for sure.

Why does my alternator run when I Turn Off the car?

Generally, an OEM harness will not have the problem of alternator “run-on”, as there is usually a resistance wire in the dash harness to keep this from happening. Solution: To figure out where the problem exists, start the car and with the key in the ON position and the car running, turn off the key.

What to do when your car does not stop running?

If it does not stop running, your feedback problem is coming from something other that the alternator. If you are using an aftermarket ignition unit, check to see if there is a fix available that includes a diode to put in line on the ignition feed to keep their system from back feeding into the ignition switch.

Can a car fan still run after the engine is turned off?

Then you notice the engine cooling fan is still running even though the car is turned off. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Your car fan will run for a few minutes after you turn off the car then turn off. This is normal in many vehicles, such as BMW or Mercedes-Benz.

What happens to the coolant when the engine is turned off?

When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated. When the engine is turned off, the coolant doesn’t circulate, and the heat stays trapped, therefore prolonging the engine from cooling. Running cooling fans help cool down the engine even after you turn off the car.

Can a car run after the ignition is turned off?

We’ve all heard a car continuing to run after the ignition key has been turned off, and it usually sounds pretty bad, with all kinds of clonking and coughing noises. These days, though, you’re more likely to hear this in the movies, when sound-effects staff is trying to show the viewers what a clunker this particular actor is driving.

Can a bad ignition switch cause a car to not start?

by Jonathan Lister. The ignition switch in Ford vehicles is responsible for handling the electrical signals related to starting the vehicle. A failing ignition switch can cause system-wide problems ranging from the ability of the car to start, to maintaining speed and even keeping the radio turned on.

What are the symptoms of an ignition switch failure?

Careful car owners can recognize the symptoms of ignition switch failure before the problem leaves them stranded on the side of the road. An ignition switch performs several functions for a vehicle.

What causes a car to shut off while idling?

Based on that information, the Engine Control Unit (ECU) decides the amount of oil to be sent to the engine. The air flow sensor will give incorrect readings if it is defective or dirty, causing the car shutting off problem when idling. Issue with the actuator will result in car stalling at idling.

Why does my car idle at a higher RPM than normal?

Updated January 19, 2019. If your car seems to be revved up to a higher-than-normal RPM while idling, it’s not necessarily a problem. If this problem happens while the engine is cold, it may be part of the engine’s design.

What causes a fuel pump to stop working?

A defective TCS or torque converter solenoid can also cause this issue. Low fuel pressure, dirty or defective fuel injectors, or broken fuel pump: The fuel pump is responsible for transferring fuel from the tank to the engine.

When do I slow down, engine shuts off inspection?

received a When I slow down and stop the car, engine shuts off Inspection. Your car is designed to run like a well-oiled machine, but sometimes that machine struggles in unexpected places. There’s not always a warning light to alert you of this, but sometimes your car will be driving fine at road speed, only to die when you slow down and stop.

Why does my car shut off after a sharp turn?

You may notice that every time you drive over a bump on the road or take a sharp turn, the radio, lights and engine suddenly shut off. This is not only frustrating but a safety issue. After a few minutes, the engine and the rest of the electrical accessories may start working again.

What should I do if my car won’t turn off?

What happens when you turn off the car key?

When you turn off the key, you expect the car to stop! It can be very frustrating when it doesn’t. If the engine continues to run just as before you turned it off – as if you hadn’t turned it off at all – your ignition and fuel system are not shutting down.

What happens when you remove the key from the ignition?

Car Engine Doesn’t Turn Off When Removing Key or Pressing STOP It is a strange problem to have a car that won’t turn off when you remove the key from the ignition or press the Engine Stop button. Your engine will continue to run even when you remove the key from the ignition because the fuel pump is not shutting off.

Why does my car engine not turn off when I remove the key?

Your engine will continue to run even when you remove the key from the ignition because the fuel pump is not shutting off. This problem is typically caused by a faulty fuel pump relay or a defective ignition switch. In this article, we take a look at why your engine won’t turn off when removing the key and what you can do to stop the engine.

Why does my diesel engine not shut off?

Since a diesel engine does not run on electric spark, the engine has to be shut off by some other means. When you turn the key off on your Mercedes diesel, you may have noticed that the engine will not quit immediately. In some cases it may even keep running a second or two after you have turned the key to the off position before it finally quits.

What to do if your car engine won’t turn off?

In case it powers down, you need to replace the main relay. If no, move on to next troubleshooting step. Check the owner’s manual to determine if your car has a carburetor or fuel injection. If you own a fuel-injected car .i.e. dieseling, you might require replacing the dripping fuel injector.

Why does my Car start but won’t shut off?

Starts just fine but won’t shut off. I have replaced the ignition switch and starter relay solinoid. Anything is possible with swaping wires by accident and if this happened it was on the ignition switch. Please check my work on this three prong ignition switch. RED wire to “B” ; PURPLE wire to “I” and YELLOW w/ red runner to “S”.

How do you restart a Tahoe when the ignition is not on?

Unlock the Tahoe driver’s door and insert the key into the car’s ignition. Turn the key to the “Run” position. This is the position where the ignition is on, but the engine is not. Wait five seconds for the security light to go off, then crank the engine.

Why is my ignition lock cylinder not working?

The ignition lock cylinder is connected to an electronic ignition switch, they work power on and start the vehicle. If the ignition lock cylinder wear out or breaks, it may prevent the vehicle from starting when the key is inserted and turned. A no start condition can also be caused by a wide variety of other issues,…

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 is my ignition cylinder not working properly?

A worn ignition cylinder may not function correctly when the key is inserted. This may lead to issues with certain positions of the key. Certain positions may not work correctly, or may require jostling of the key before they work.

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.)

Why does my car run when the ignition is turned off?