Stalls only when warm

2004 BUICK LESABRE
10,000 MILES • 6 CYL • 2WD • AUTOMATIC
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MKNG1
  • MEMBER
  • 2 POSTS
When I start my car in the morning, it starts up no problem. If I run the car and then start it within half an hour or so, it often starts very rough, vibrates and stalls out. This only happens after the car has been on and then turned off. Never when it's started cold. Any ideas?
Dec 1, 2008 at 12:19 PM
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DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Service engine light on? if yes have codes read then psot will advise. If no a diagnostic scan of PCM would help find problem.
Dec 2, 2008 at 12:11 AM
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MKNG1
  • MEMBER
  • 2 POSTS
No check engine light. I'll have them do a scan and hopefully that tells us. Thanks.
Dec 2, 2008 at 1:21 AM
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LORENT
  • MEMBER
  • 1 POST
I had the exact same issue. After 3 visit to the Buick garage and other " experts" advise I found it was a bad MAP sensors. No codes were ever displayed!!
Mar 17, 2020 at 10:43 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

This could be a spark issue or a fuel delivery issue.

https://www.2carpros.com/articles/engine-stalls

A bad ignition control module will cause this as well as a bad crank sensor.

Both items will not code so old fashion diagnostics has to be done.

If it does not start right back up, it could be fuel delivery and that could indicate a failing fuel pump.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

If it starts right back up, it is most likely spark related.

Roy
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Mar 17, 2020 at 10:53 PM
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