Rough and/or High Idle Due to Engine Vacuum Leak on Buick Regal

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: 127,000 (95,000–160,000)
Engines affected: 3.1L V6, 3.8L V6 Supercharged
5 model years affected: 1990, 1991, 1992, 1993, more1999
10 people reported this problem
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check eing light on reads vac leak detected
Car idles rough (new spark plugs) cruze control lights up but doesn't work, heating, AC ducks come out on the floor, won't switch toc anything else.