I tried checking the wires coming from the MAP sensor to the ECM. The light green wire had resistance, so it was good. The other two wires gray and black/pink, I couldn't test them. The gray wire goes to the MAP, TPS, and ECM. TPS is working fine. Then the black/pink goes to the MAP, MAT, and ECM. MAT is working. I even went back to Autozone and said the MAP was faulty and got another new MAP sensor, but still doing the same. I also replace all the rubber pieces and rubber vacuum hoses. None of those are leaking.
I watch a video on Youtube about how to test your MAP sensor. It said the MAP sensor should be at 5 volts at idle and for every 1000 RPM is should drop 1 volt. My MAP sensor is at .1 volt so that'* probably why it'* rich because it thinks it'* at WOT.
One problem is which wire do I check for voltage on the MAP sensor and why is the TPS and MAT working ok, but each share a wire with the MAP sensoer? I'm thinking the gray wire is bad since my TPS did explode.
*2005 Vette LS2 103k DD
*1980 2 door Pontiac Bonneville Olds. 350 Diesel 198k *1991 Pontiac Firebird ??? 195k *1987 Chevy V10 Silverado Chevy 350 HSR 230k *1993 G20 350 TBI 252k