I think the MAF should be failed. It's all unplugged and I have all the codes turned off as well as set the ranges to fail it. My crank signal should be good. It's the gm sensor running off the...

I'm not looking at it right now, but there is a max shift pressure but I don't remember seeing anything about MAF fault.

Hi all,
I am working on a 1999 k2500 chevy pickup. I swapped in a 12 valve cummins and built up the 4L80e. Im using the black box ecm to control the transmission, cooling fans, and A/C etc. I...