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1987 Pontiac Bonneville 3.8L Poor Idle Quality
Posted to GM Driveability on 3/13/2003 9 Replies

Idles around 1200. TPS .37. IAC 60. The computer never appears to try to lower the idle. IAC won't go below 60, but it will go up to 170 in gear with a/c on. When first started it idles at 950, and then slowly creeps up. Any help would be greatly appreciated. ...

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Message Closed w/Summary

car Vehicle Data

1987 Pontiac Bonneville

VIN 1G2H25439H
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI
SymptomsPoor Idle Quality
OccursAlways
Message Closed w/Summary

car Vehicle Data

1987 Pontiac Bonneville

VIN 1G2H25439H
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI
SymptomsPoor Idle Quality
OccursAlways