I was at the track this weekend and ran my car for the 1st time. This code came up for random multiple cylinder misfire and when I EVO scanned a run it showed five counts of knock. The knock and code appeared only after i hit the third gear rev limiter. I am running 25lbs of boost on regular 93 no Meth. Should I be worried? Car didn't seem to be pulling any timing and had great power. Thanks