[BYprodriver]

Originally Posted by uladzislau

I know it's 2011 post but I've got the same problem recently and can not find the issue as well. Throttle body was cleaned as well as the idle control valve. AOS is file as I did not find any oil in the throttle body. I was thinking that this might be a vacuum leak kind of doubt it as RPM drops back to normal in 3-5 seconds after the clutch pedal is pressed. Throttle cable is fine too - I've logged via OBD2 throttle position as I drive and I see that when the RPM get stuck throttle is closed but MAF continues to report some air flow. This points to a bad MAF or possible bad idle control valve.

So did anybody figure out this issue at the end? I'm gonna start with MAF and if it does not help will try idle control valve.

Thanks for searching 1st, always good to post your year model & mileage also.
I agree with your plan & also recommend you have someone work the gas pedal while you watch the T/B fully open & close just to be sure it's adjusted properly.