I flashed to stage 2 two weeks ago (running the testes stg2 rev3 base map) and about two days later i got a cel. well 2 of them, p0301 & p0303. I know that my midpipe does hit my floor board a little.
Would the midpipe be causing a false knock which could be increasing timing in turn causing a misfire?
Is that at all possible?
Also i just replaced my sparkplugs on thursday night.
Any other clues on what might be causing a misfire would help