Welcome to the forum. First and formost, I recommend going to the new forum site listed in my signature.
Second. High Revving, I would pull the intake air tube and clean the throttle body as well as clean he MAF sensor, if you have a K&N style filter I would recommend throwing it away and buying a paper filter. The MAF's do not like oil.
Fan stuck on a specific setting, sounds like a bad control module or dirty switch. (i.e. the part in the dash you adjust)
|