I wonder if the UpRev re-tune will fix the gas milage and idle a bit? My gas milage has already recently taken a hit after installing my momentum headers + motordyne ART pipes and I have the ported throttle bodies on their way back today hopefully as per Scott. Curious to see where this ends up in terms of power. So was the P0300 code just a problem at first, and has subsided since then DR_?
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