hey hawk, we tried to talk a little about this while i was in the staging lanes at the AZSRA event sat night. this is definatly a weird issue, since the ME shouldnt effect anytghing with the pcm, did you tap into any wire of the pcm for the install, the tps or rpm wire? did you try to, maybe nicking one of the wires? now when you say as soon as you plug in the ME is the activation switc on? what does the screen of the ME say, do you have everything hooked up/ plugged in wih the car not running, and the key on, what does the ME say? i think i remember you saying that you we running the interface too right? when are you plugging in the ME, it should just be left plugged in, the switched 12v turns is on, and the arm switch activates it