- Aug 7, 2018
I've been having surging issues for a couple of months now. I replaced my IAC and checked for vacume leaks and tested my TPS. The surge is only slight. Maybe 25-50 rpm when its warm and on a real cold start it surges quite a bit for about a minute before smoothing out. I've done a reset and I've never messed with the throttle set screw. But I heard somewhere that the car should die when I unplug the IAC and mine doesnt. Seems normal since the IAC should just add air and the set screw should allow just enough for an idle. So do I have a vacume leak somewhere? Only vacume line I haven't checked is to the charcoal canister in the passenger fender. Can I just cap that line off and see what happens? Thanks and sorry for multiple questions in one post.