Quote:
Originally Posted by Camaroguy
Interesting little problem I have been having. Every since we fired this motor, I have been trying to chase down a check engine light showing low voltage to the MAF. I have tried a couple different MAF Sensors without any success. Started trying to figure it out, and through the process of elimination, I came to the realization the MAF connector was wired incorrectly. Just got off the phone with Hotwire Auto and we went over his schematic and he confirmed the B = black wire and C = red wire are flipped.
Interestingly, we are currently doing the same motor in another truck for my nephew and his was wired incorrectly as well.
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I ran into a similar issue while doing an LS swap. I was using a factory truck harness but used the newer “card style” MAF instead of the truck one. Thought I had a bad MAF but it turns out that GM uses a different pin out (same plug shape) for the two styles of MAF. Once I looked at and compared the wiring schematics, I swapped the two wires and bingo.