Grand Prix

Corrosion At Ignition Coil Towers on Pontiac Grand Prix

Problem Description and Possible Solution

Corrosion may develop at the connection between the ignition coil tower and spark plug wire resulting in an engine misfire. The Ignition coil and spark plug wire should both be replaced to correct this condition.

Problem Data
RepairPal Verified
Average mileage: 113,750 (112,500–115,000)
Engines affected: 3.1L V6, 3.4L V6
10 model years affected: 1994, 1995, 1996, 1997, more1998, 1999, 2000, 2001, 2002, 2003
14 people reported this problem
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Vehicle would misfire between 1500 and2000 rpm with the gas pedal position held at a cruising speed. Two ignition coils each had one terminal with excessive corrosion. Replaced both coils and the plug wire set.