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1994 Pontiac Grand Am Cold Start Stall

Tiny
TOMATO
  • MEMBER
  • 1994 PONTIAC GRAND AM
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 155,000 MILES
Car tries to stall when cold. Idles fine, stalls only when driving within the first mile, runs fine after that. No check engine light, cant find any vacuum lleaks, fuel pressure is good. Put a scan tool on it and it looks like it is stalling when going into closed loop.
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Tuesday, June 1st, 2010 AT 7:37 AM

2 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
Maybe faulty ECT located upper right enginr near exhaust pipe. Measure resistence cold 3000 ohms warm engine resistenc should drop to @150 ohms at operating temp. If ECT sends wrong info to PCM and goes into closed loop to soone engine will lean out and stall.
Let me know
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Tuesday, June 1st, 2010 AT 11:13 AM
Tiny
TOMATO
  • MEMBER
  • 2 POSTS
Replaced engine coolant sensor, intake air temp sensor, no luck.
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Tuesday, June 1st, 2010 AT 11:25 AM

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