In addition to everything you did I swapped out the MAF sensor and there was no difference. That would rule out the potentiometer assuming that you were talking about the pot on the MAF sensor. It was a junkyard part but still there was no difference in what the car did. I will also try and dig into this. I am in the process of disconnected electronics and checking connections - everything looks good so far. Good luck - I'll keep reporting any progress.