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

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.

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