Re: P304 misfire and loud noise
one question: is there anyway to make sure that this is the gasket between the lower intake manifold and the cylinder head before "diving in" ?
I don't want to start the whole thing if it's not really the problem.
by the way, I have exactly the same prb then the OP: loud whistling noise, P304 code, changed the spark plugs, wire, PCV valve but error code still the same
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