I'm getting P0304 code misfire cyl 4. I've swapped coils and plugs to cyl 1. My coils are the updated Bosch coils and have about 20k miles on them. I erase the code when I swapped the coils/plugs and in about 75 miles, the code comes back as p0304, the check engine light only comes on at start up/idling and the car drives fine, I dont feel any hesitation or surging. Any idea what it could be or what to try next? Thanks.
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Last edited by Halftim3; 11-06-2020, 08:57 AM. -
Injector, valves out of adjustment?
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All jobs done as diy - clutch, rod bearings, rear subframe rebush, vanos, headers, cooling, suspension, etc.
PM for help in NorCal. Have a lot of specialty tools - vanos, pilot bearing puller, bushing press kit, valve adjustment, fcab, wheel bearing, engine support bar, etc. -
I was thinking injector also. As for valves out of adjustment, it could be as its about that time, but I didn't think it would throw a code.Comment
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