Hi sfallon. I'm having that same exact issue with my 07 WRX. It happened last year as well, my brother in law and I replaced the air-flow valve and it was fixed. Till I got a car wash a few months ago and it happened again. Apparently water gets into the open valve and breaks it so it is stuck open. But I hope there's an easier fix then having to replace it every year.
Thursday, November 10th, 2011 AT 2:54 PM