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How to Troubleshoot a Car That Won't Turn Off
If your car won't turn off, inspect the power relay, idle speed, ignition timing, and spark plugs. Using premium fuel may help but isn't a solution.

Related questions

Question
My car starts but won't stay on
Hello there, many faults will cause your 2005 Chevrolet Equinox to start then die. The most likely causes for your vehicle are the crankshaft position sensor, MAF sensor, fuel pump relay, ignition coil, or a wiring harness fault. If the...
Question
My truck turns over but stops turning over by itself and won't start back up.
Hi there. Sounds like you have a starter motor that is failing. When the starter relay gets hot, it will overload the ignition circuit and shut off when cranking. Check the battery cables to the solenoid on the starter and...
Question
Low Idle and stalling when breaking
Hello there, many common faults will cause your 1997 Jeep Grand Cherokee to die when the vehicle comes to a stop and have a low idle. You have done great in replacing the idle air valve as this is a...
Question
Car dies under acceleration
Hello there, many common faults will cause your 2001 Toyota Corolla to have a loss of power. Replacing the spark plugs is a great place to start as this is one of the causes. Other potential faults are the the...
Question
Intermittent problem with car dying while driving
Hello there, many common faults will cause your 2002 Toyota Camry to stall while running and not restart. The most common faults are the fuel pump, ignition coil, MAF sensor, oxygen sensor, crankshaft position sensor, alternator, battery or a wiring...
Question
Engine will not idle, no power and sometimes it dies while driving
Hello there, many common faults will cause your Nissan Sunny to die while running and idle poorly. Without knowing the exact year I can only give a general answer to your question. The most likely faults for a rough idle...
Question
Ignition Problem
Hello, thank you for writing in. To better understand this strange issue, it helps to know that the engine receives most of its power from the alternator once the engine has started. When the field to the alternator is not...
Question
Starts then dies.
Hello there, many common problem will cause your 2002 Volkswagen Passat to start the die and have the check engine light illuminated. You have done well in diagnosis so far and in replacing common failure components. Before any more parts...
Question
Car starts on cold mornings, then shuts off while driving
It sounds like you've been addressing a number of issues. Of the parts that you have had replaced, only the crankshaft sensor would be one that would be likely to cause your car to shut off while driving. You could...
Question
My car will start but will only run for a certain amount of time before the engine shuts off. Then it won't start. Why?
Hi there. In many cases, when the car will start but quickly stall, it's due to either a reduction in fuel flow (caused by a worn out fuel pump, dirty fuel filter or clogged or dirty fuel injectors or the...
Question
Car won't shut off when I turn key off. I have to bang the steering wheel hard for it to turn off.
Hello, thank you for writing in. When the vehicle fails to shut off after turning the key in the ignition, the ignition or the alternator are not "turning off". Although it is a bit more technical than that, these are...
Question
car completely died going down road now won't start
Hello there, without knowing your make and model I can only provide a very basic answer. Touching the ignition switch wires together to start the car will cause long term damage and can damage the wiring harness. Many common faults...
Question
Car engine turns off and dies when car is put in reverse or drive.
Hello there, many common faults will cause your 2008 Nissan Altima to shut off when put in drive or reverse. The first step in diagnosis is to check the transmission for leaks, and the fluid level and condition. Once the...
Question
Went to flush radiator, car heated up and refused to turn off
There is a vacuum pump on the front of the engine near the water pump, The large vacuum line that comes out of it branches off to three or four smaller lines not far from the pump connection. They are...
Question
Car won't turn off
Hello. Thank you for writing in. This may seem like magic or voodoo, but the vehicle not turning off happens more than one might think. To start, lets discuss the fact the battery does not power the vehicle when the...
Question
Car shuts off and won't start 2007 Chrysler PT Cruiser
Hi there - first task is to check for problem codes, whether the Check Engine light is illuminated or not. This "stall, no start" behavior could be a failed fuel pump - check the fuse and relay - since the...
Question
is the anti theft control module the reason why my car turns off immideatly when i turn it on ?
Your car has what Mercedes calls the Driver Authorization System. "DAS" if the DAS does not recognize your key via an electronic code, it will not start at all. If your car starts and shuts off immediately, there is some...
Question
Went through a puddle and my car won't start
Most of the time when people describe shutting off after driving through a puddle, drying out the ignition system is enough to get it going again. But if that were the case here, with the pieces that you have already...
Question
I have a 2011 Hyundai sonata and the key is stuck in the acc position and will not turn off. I can start the car but I can't turn
Hello, thank you for writing in. When the key will not turn to the "Off" position, typically that will mean that you have an issue with you neutral safety switch. This safety feature limits your ability to turn the key...
Question
My car will not stay started after installing a new alternator
Hello. You will want to check that the alternator installed has the right amperage output for your vehicle. Some vehicles take two or maybe three different types of alternators and the one that was installed may not have sufficient power...

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