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Pontiac Repair/2004 Grand Am Misfire


I have a 2004 Pontiac Grand Am with the 2.2L 4cyl with 109k miles. It is running rough and the check engine light is on and will sometimes blink even when at idle and throws a P300 engine code.  We haven't driven it since this started.  I've put a set of plugs in it, noting that the plug in cyl. 1 was dry, the other three were wet and you could smell fuel on them.  When that didn't solve the problem, we changed the coil packs which has also not solved the problem.

Hi Jason:

usually on these it's either a coil assembly of the iginition module that attaches to the top of the coil assembly. It could also be some sort of a mechanical issue. with out seeing it I can't telll you for sure but I would say 80% of the time it's wither the coil pack or module you already tried the one part it could be the other. just guessing is expensive but it's a pretty likley cuase.

good luck :-)

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Todd Puccio


General auto repair,electrical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm specific. I have worked at my current dealership since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way. If your happy with the answer I gave you please feel free to Donate. This is a free service to you and I am not compensated at all by this web site. I have 22 years of experience to share with you and my knowledge wasn't free to me. I had to pay for my education.


Experience in the area: I have been a technician in GM dealerships for over 22 years and I am a ASE master technician. I work at a Buick and GMC truck store Previously I worked at a Pontiac GMC store for 18 years. I Served a a lead technician when dealership was on a team system. I just recently moved to a Buick,Hummer,Saab Store when my franchise was purchased by this dealership. Organizations: ASE master technician


Education/Credentials:High school diploma,2 year vocational school degree 2 year college degree. Associates degree in applied sciences (auto technology)Awards and Honors: GMC master technician

Awards and Honors
Master GMC truck technician Master ASE technician in 9 categories

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