I disconnected the electrical connection to the IAC motor to check valve cover bolt tightness under it. I forgot I'd unhooked it,and when I started the engine I got a Check Engine light and it won't idle unless I feather the throttle. Reattaching the elec. connector didn't help. Unhooking the postitive cable by the underhood fuse box for 1 minute didn't help. I've unhooked it again; for 25 minutes now. No IAC problems before this.. ANything else to do? If I need to unhook the computer do I unhook those 3 big plugs below the computer-and for how long?