I look at the PID's at frame (-5) to (+5): load increases & MAPgauge drops- you got on the throttle BUT B1S1 & fuel trims show that you're not WOT (O2 & STFT only "peg" at frame +5to+10) & fuel control is good(FT stay near 0) - so MAF is good. Since MAP/load c... Login to read more.