need idle speed advice
My 2002 wrx is throwing code p1507 for idle speed control. It idles very high, sometimes over 2k rpms, and fluctuates and sputters when I come to a stop or turn on fan or ac, but never to the point of actually stalling out. I suspect its an iac or vacuum leak problem, but was wondering if it could possibly be related to having a catless downpipe installed about six weeks ago. CEL came on the day I had the pipe installed, but ran fine for four or five weeks after that. Any insight would be greatly appreciated. Also, I have had an act streetlite flywheel on for over two years, but I don't think that's a factor.
Also, do I need to remove the whole intercooler to access the iac valve by sliding it out, or start by removing the contraption on top where the coolant line runs into it? Anybody?
Last edited by mattyt02wrx; 06-10-2007 at 12:27 PM.
Reason: left something out