Mine did the exact same thing I've got one working fine still fighting the other one shielding with foil helps and reversing the feed wires seems to make a differance also I found my battery connection caused more sensitivity some have give up on these kits xenon dept won't return my call and act like they have no idea this ever happens like I said mine did the exact thing you described I still can't figure out how it makes it run fast with throttle cable and throttle by wire