Q: P0306 code after replacing COP, wires and spark plugs. What else could it be?

asked by on October 16, 2016

Had stalling problems pull codes for 5 and 6 cylinder misfire. Replaced spark plugs, wires, and COP on cylinder 6. Still have misfire on cylinder 6, what else could it be?

My car has 175000 miles.
My car has an automatic transmission.

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