Pontiac Repair: 02 pontiac grand am, head gasket, pontiac grand am

Question
engine size is 2.2L 4 cylinder  it is misfiring on the middle cylinders replaced plugs and coils still misfire looking for other things i could check

Answer
Hi Joseph:

well 23 and 3 cylinders have nothin in common as far as ignition coils they are on seperate ones. This could however have a bad Ignition coil cover bad. the pastic piece that the coils sit in the insulation breaks down and they cross fire then. That is common. Does it have injector pulse on 2 and 3? have you done a compression test. If the head gasket is blown between those 2 cylinders that could be your issue as well. That is where I would look first. good luck :-}