2001 Pontiac Grand Prix runs, then dies!

Tiny
COOLTECH-57
  • MEMBER
  • 2001 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 112,000 MILES
My Pontiac will run for 5 min or 20 min and die just random. I have replaced the computer, ignition module and the crank ps some time ago. No codes showing. The spark is non existent when this happens. Sometimes it starts right back up, sometimes not until the next day.
Wife's go'na kill me if she has to walk again!

Can someone please offer some helpful knowledge? Thanks, Cooltech-57
Wednesday, July 8th, 2009 AT 12:54 PM

3 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
Generally symptomatic of a bad module, but since you changed it, I would look for a burnt wire in the ignition system, maybe an exhaust leak. The PCM will shut fuel off to engine if it does not get a spark reference pulse.

Could also be bad coils(s).
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Thursday, July 9th, 2009 AT 10:07 AM
Tiny
COOLTECH-57
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  • 2 POSTS
Hey, this is a great site and a fast intelligent reply. Thank you, I will check the recommendations and reply with the results later.

Thanks cooltech-57
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Thursday, July 9th, 2009 AT 3:44 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
Let us know what happens.
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Friday, July 10th, 2009 AT 9:17 AM

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