youngtryhard Posted July 21, 2017 Share Posted July 21, 2017 I have an 07 LGT and I’m getting the p304 code that I have a misfire on cylinder 4 I changed the plugs and coils and reset the code still came back. My next option is doing a compression test and swapping fuel injector places to see if I get a misfire on a different cylinder. The car runs fine idles at 791 has a cat back exhaust so makes pops between shifts hits boost 12 to 13 pounds the only other thing I notice is once I let go of the gas pedal in first gear it like hesitates a little the car has 176k the engine was rebuilt at 110 they even bothered painting the block red. So if anyone has any other ideas that can help me out please feel free to reply. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
relative4 Posted July 21, 2017 Share Posted July 21, 2017 You're on the right track with the injector swap, then the compression test. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted July 22, 2017 Share Posted July 22, 2017 Yep. And after all that and if it still stays in #4, check your valve clearance. Can you log the roughness count in cylinder 4 to see if it occurs mostly at idle or something? Link to comment Share on other sites More sharing options...
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