ok fellas i need help i got a 97 grand am SE 3.1 i bought this car for $350 it had bad head gaskets so i replaced the head gaskets intake gaskets and lifters car runs fine except when in park or stopped it has a misfire on cylinder 3 only i did a compression test on all cylinders and they were all between 155 and 160 psi i also changed the plugs and wires i first thought it was possibly intake related but if was intake related it would white out the plug when fouling not turn it black so basically I'm annoyed by the misfire but Ive drove the car from Ohio to Tennessee without a problem but i would like to find out what it is before it cause's serious problems. please help
misfire p0303 please help
- Thread starter jojo12
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