Stalling engine when cold

GMDRIVER

MEMBER
1990 CHEVROLET CORSICA
130,000 MILES

I have a 1990 Corsica that stalls when the engine is cold. I looked for broken vacuum hoses. That turned up nothing. Can someon suggest what to check next? Once the engine has warmed up, after about 15 minutes, the car runs okay.
Thanks for the help,
GMuser

3 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

I would also consider checking that the coolant temp sensor is working correctly, this is not the gauge sender bit a sensor that tells the ecu the engine temp, if faulty the ecu may not be going rich for cold run conditions, often a scan will show up this fault.

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Saturday, October 8th, 2011 AT 10:38 PM

GMDRIVER

MEMBER
3 POSTS

Thanks mhpautos for the reply, I will try replacing that part.
GMuser

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Friday, October 14th, 2011 AT 5:33 AM

GMDRIVER

MEMBER
3 POSTS

Dear mhpautos,

I replace the coolant temperature sensor. Unfortunatley, that did not solve the problem.

Me and a friend are working on this problem. We also replaced the IAT and the MAP sensors and checked for vacuum leaks. None of these fixes helped. So, let me describe the problem again. The car starts okay and when the engine is cold it idles rough. This is while it sits in the driveway. When I press on the gas, the engine does not rev up. It hesitates for about 5 seconds then it revs up. If I'm driving down the road with a cold engine, this is a problem. When I slow down and then speed up, the car behaves this way.

So, can you make other suggestions on what may be wrong with the car?
It's a 1993 2.2 liter (VIN 4) "L" carline.

Thanks,
GDdriver

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Wednesday, November 2nd, 2011 AT 10:02 PM