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ENGINE STALLS AFTER WARM UP. WHAT WOULD CAUSE IT

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Chevrolet Caviler 2.4 - 2000 Stalls at idle (stopped) once car is fully heated up.


Check coolant temp sensor. These fail often and cause all kinds of mystery problems. This unit acts much like a choke on old carb engines and can fail in different ways. Most common (I think) they fail such that the ECU thinks the engine is cold when it has begun to warm and thus the ECU delivers too long a pulse to the injectors so that the engine runs way too rich. I think it is also possible for the sensor to fail at any point between cold and warm such that the fuel mix is wrong except for the particular temp at which the sensor is stuck. Also O2 sensor has some fuel "trim" input.

Feb 26, 2015 | 2000 Chevrolet Cavalier

1 Answer

My 2003 Saturn Ion seems to run good but once I warm it up in traffic it's a different story. When the car comes to an idle it stalls out.


Do you have a check engine light? Could be an ignition problem that can cause this when the engine gets hot and it stalls. It's caused by a lack of spark which can be either the ECU's fault (on EFI cars), or the coil on pretty much any car.

Feb 02, 2015 | Cars & Trucks

1 Answer

Engine stalls, after hour or so engine starts again


It may be gas or ignition related. Try to determine which, when it stalls and won't start. With key on, you should hear the fuel pump turn on for about 2 seconds to pressurize the lines and fuel rail on the engine. If you don't hear the pump, and have no pressure in the fuel rail with key on, it is probably a bad pump.
If the pump is working, check for a strong blue spark on a spark plug wire after it stalls. If no spark on any of the plug wires, suspect the crankshaft position sensor or the ignition control module. Either one can cause those symptoms- failing after it gets warm or hot.

Apr 09, 2014 | 1994 Plymouth Voyager

2 Answers

When my 92 chev van Lumina gets warm it stalls and won't start till It cools down. What could the problem be.


You'll need to get more information. Find an auto parts store that offers free engine code readouts and have them tell you what the engine computer has detected. This will shorten the long list of possible causes. Post again with the results - you may get to post your own solution.
I've had a bad fuel injector driver transistor in the computer (throttle body injection) and an ignition module do this to me.

Oct 03, 2012 | 1992 Chevrolet Lumina APV

1 Answer

Ok I have a toyota corolla AE91 ... It starts it runs for 20 minutes or so then it stalls. The engine cranks but does not fully start. It only restarts when the car has cooled down. My mechanic changed the...


One possibility is that the engine coolant temperature sensor is faulty and is stuck in full cold mode. Lots of fuel is scheduled for cold starts, however, as the engine warms up, it needs less fuel. Too much fuel when warm and the engine floods out or riches out. The engine coolant temp sensor is telling the computer that the engine is ALWAYS cold even when it is warm. So, too much fuel is being sent once the engine is warm.

Feb 13, 2011 | Toyota Corolla Cars & Trucks

1 Answer

Stalls on warm startup ... and when warm ... in


you may have a problem with your fuel injectors or maybe in your spark plugs or the main coil if one of your injectors or sparkplugs are weak or dirty this will cause your problem you should go to an auto repair shop and they can help you further! good luck!

Dec 18, 2009 | 2002 Ford F150 Regular Cab

1 Answer

94 Lincoln TC engine stalls when slowing/stopping


Most common cause of stalling for Lincolns in that era is the TPS (Throttle Position Sensor). It regulates fuel mixture, idle speed etc. A bad TPS will usually act up in one of two ways:
  1. When cold, car continually stalls
  2. When warm, car stalls when slowing down (especially if AC is on)
As far as valve cover oil leak, it's a problem that should be addressed to keep oil from fouling your spark plugs but highly unlikely to be the cause of your stalling problem. Hope this answers your question. All the best.
Greg

Jun 16, 2009 | 1994 Lincoln Town Car

1 Answer

Car idles low, stalls after start


Common issue at the shop (i'm a ford technician), here is what I do to correct it.
Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Mar 11, 2009 | 1999 Mercury Cougar

1 Answer

Check engine light comes on when car is warm.


could be the crank sensor breaking down when hot which will cause you to lose spark,get it hot and see if have a spark from plug lead after it does cut out and this will verify it.

Dec 18, 2008 | 1999 Hyundai Accent

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