the TPS has nothing to do with the way it idles. The commander computer recognizes where its at in relation to the high setting to calibrate the voltage, so that's not it...I dont have a stock computer/ stock wiring harness to try, but I was thinking that route. I have a DFI, I should be able to make it work, dammit lol. A vacuum leak will give the same crazy idle....I will see what I can come up with. I just have heard nothing good about those trick flow cams, and thought it might be the problem.