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Oldsmobile
Cutlass Supreme
29

Rough and/or High Idle Due to Engine Vacuum Leak on Oldsmobile Cutlass Supreme

Problem Description and Possible Solution

The upper intake manifold gasket and/or a PCV vacuum lines/hoses can develop vacuum leaks with age. This type of leak can result in a higher that normal or rough idle.

Problem Data
RepairPal Verified
Average mileage: 166,167 (117,000–211,678)
Engines affected: 3.1L V6, 3.4L V6
7 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996
29 people reported this problem
Comments
Viewing 1 - 5 of 5 comments
idls very low . when put in drive or rev. engine cuts off. i have to two foot drive so it doesn't cut off at red lights.