Quote Originally Posted by JIMS SVT View Post
Is it tuned?
It was apparently tuned before I bought it by STLMustangs HQ (I bought the car from a guy just outside of St Louis) for the emissions parts removal. Smog pump, egr, purge valve, etc. The previous owner told me he took the smog parts off the car because of "some emissions related check engine light". From my research that would make sense as the car has to be tuned to turn the EGR off. I also read that the Theft light flashing on the dash can be a result of the car being tuned or the ECU being tampered with in some way. It is the stock AOL3 ECU as I did confirm that last week. The more I dig into troubleshooting the car the more I think the idle issue is related to the emissions parts removal, aka vacuum leak somewhere, or the tune itself. The car runs fine and pulls good otherwise, but this idle / rpm hang issue is super annoying.