Highter Than Nornal Idle Due to Vacuum Leak on Buick Roadmaster

Problem Description and Possible Solution

The throttle body gasket may develop a vacuum leak which may result in a higher than normal engine idle. Failed gaskets will require replacement.

Problem Data
RepairPal Verified
Average mileage: 178,517 (178,517–178,517)
3 model years affected: 1991, 1992, 1993
4 people reported this problem
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Idling at 1500 remember which is about 500 higher than what it should be. Not sure how to fix it tried a tps but that didn't work. Haven't resolved it yet..