Question about 2000 Pontiac Grand Am GT

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Pontiac Grand Am 97'

What would cause misfiring in cylinders 2 and 3 in the 97' Pontiac Grand Am? I have the same problem with a 2000 4 Cyl. Grand Am. MisFiring, higher octane fuel or octane booster aditives seem to lessen the problem however does not ultimately resolve the issue. I have ran fuel injector cleaner with very little success. Every time I take it to someone they want to change the Coil tower. The coil tower has been changed 4 times in the last two years. Idles rough, shuts off periodically, spudders on inclines, generally misfires. Connected an ODB2 observed no problems. Short of having the fuel injectors cleaned or replaced I'm at a loss. Any help would be appreciated.

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There are no wires on the 2000, they are coil packs. i have the same problem with mine, cylinders 2 and 3 misfiring. i took it to a local repair shop and replaced the ICM and the coil packs and it is still doing it. any ideas would be greatly appreciated i dont want to keep replacing parts i dont need to

Posted on Jan 23, 2009

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Di you change the spark wires? is there a change you changed wires and with that you changes the spark sequence?, if so swap the wires from those cyl.
hope it helps

Posted on Dec 23, 2008

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