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Rough idle when starting

Tiny
BLAMMO
  • MEMBER
  • BUICK LESABRE
I have a 95 Buick Lesabre 3800 engine, with 89,000 miles on it. I had the gas tank, fuel pump, filter and oil changed last week. Yesterday the check engine light came on when I was driving it, but the car ran great. This morning when I started it the engine light came on and it idles rough then smooths out. No weird smells. After the cars idle smoothed out it ran great. Any ideas. Thanks
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Tuesday, October 16th, 2007 AT 8:53 AM

1 Reply

Tiny
CLY
  • MECHANIC
  • 308 POSTS
First thing I would check would be the fuel pressure regulator. Make sure that fuel is not coming out of the fitting where the vacuum line hooks up. Also I would have the codes scaned. You could have a bad upper intake or gasket that is bad. If you have the car scaned for codes and find some codes for the EGR then I would pull the upper intake off and inspect the port that the EGR tube fits into for punctures and cracks.

Cly
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Sunday, October 21st, 2007 AT 8:08 AM

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