have a 1994 grand am 4door se with quad4 4cyclinder its runnig rough I've replaced coil packs, spark plug boots, the howsing for coil packs still has a miss to it havent changed plugs yet.

Asked by chevy72 Dec 28, 2012 at 07:45 AM about the 1994 Pontiac Grand Am

Question type: Maintenance & Repair

177,465

tenspeed answered 11 years ago

Changing the plugs would have been one of the first things I would have done. Buy a premium plug with a single electrode and a platinum or iridium tip. The Grand Am coils spark two plugs at the same time and that wears out the cheaper plugs. Go to RockAuto.com for a good selection.

Mark helpful

69,795

John answered 11 years ago

Had a friend with a 93 holds with the same engine doing the same thing. Pulled the vacuum line off the fuel pressure regulator because it was moist at the regulator and the diaphragm had ruptured spilling fuel into the intake. Worth a look.

Mark helpful

Your Answer:

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