Question about 1991 Pontiac Grand Prix

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Idle problem As of couple of days ago my car was fine. I installed a fender and door the car was fine. So I drove it(couple days later) and noticed when I came to a stop the idle would surge up and down. then it would shut off. Starts right back up and no trouble when running. Its a 91 Grand prix se with the 3.1 V6.As of today I drove it about 70 miles and no trouble till I come to a stop then it would surge and almost shut off till I bump the throttle then it would be fine going again.Sometimes I when I start it the idle would jump all the way up to around 2000 rpms the drop. Iam thinking it might be the idle position sensor.. Thanks for any help....

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  • metman2283 Nov 08, 2008

    i have the same problem exact did you figure it out please let me know thanx

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I found the problem dirty throttle body. Thanks though...

Posted on Aug 08, 2008

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Check your relay and underhood fuse pane to see if you pinced some wiring

Posted on Aug 07, 2008

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