1991 Chevy Lumina Stalling at idle

Tiny
NZEC47
  • MEMBER
  • 1991 CHEVROLET LUMINA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 94,000 MILES
My 1991 Chevy Lumina APV begins to shudder and stalls when coming to a stop after the car reaches operating temperature (20 minutes of driving). I have tuned it up, cleaned the fuel system and changed the plug wires. The car runs fine when cold and on very short trips. I'm thinking of replacing the ECM. What else could it be?
Sunday, April 27th, 2008 AT 9:46 AM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS


https://www.2carpros.com/forum/automotive_pictures/62217_95_OlderGM_15.jpg

Cross these two terminals as shown, then turn the key on. Count the flashes, a 22 will flash as 2 flashes then a short pause, then 2 flashes, if more than one code is stored, the pause will be longer. The codes will display three times and end with 12. Write them down and post here. This connector is right under the middle of the dash...If you find there are no codes, check the idle air control valve, it's bolted to the side of the throttle body.
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Sunday, April 27th, 2008 AT 10:06 AM

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