Help!! MAF problem with Nistune

[nissanman04]

I fired up my KA-T today for the first time and everything went great. I took it around the block real easy and it seemed to run excellent for not being tuned, idled perfectly at 900. I went inside to eat lunch and came back out to play around with Nistune some more. I crank it and it won't catch unless i give it a lot of throttle. I'm thinking I have an air leak somewhere (running really rich, really rough). Nope. I look at the consult display in Nistune and I am getting an AFM code from the ECU. The voltage was a constant 5.11, meaning the ECU is dumping fuel, hence the rich condition (so rich, my wideband was pegged at 8.0 AFR, the lowest possible value). I unplug the MAF connector and the voltage goes to 0. I swap out the N60 MAF for my stock one, just to see if the MAF happened to go bad. Same thing, pegged at 5.11V. What would be causing this? I'm kinda stuck right now. I'm probably (hopefully) missing something really simple.

[nissanman04]

Turned out to be a bad ground...