Grand Prix

Rough Running Engine Due to Vacuum Leak on Pontiac Grand Prix

Problem Description and Possible Solution

The engine vacuum hose to the MAP sensor may crack resulting in a vacuum leak causing the engine to run rough and/or stall.

Problem Data
RepairPal Verified
Average mileage: (–)
Engines affected: 2.3L 4 Cylinder, 3.1L V6
2 model years affected: 1990, 1991
3 people reported this problem