Rough and/or High Idle Due to Engine Vacuum Leak on Chevrolet Celebrity

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: 120,000 (120,000–120,000)
Engine affected: 3.1L V6
1 model year affected: 1990
3 people reported this problem