i have no ac so i couldnt be that. and i have looked at the valve cover and couldent find were it plugs in at. but my buddy has the same truck as me and that wire on his truck goes to the valve cover right abover the 2ed cylinder. but i dont have the spot to plug it in on my. then i looked at pics of other 22re's and some have that plug and some dont. so idk. is there any place else you can think of?