For the kind of idle that surges when the clutch is engaged, or stays the same when the clutch is engaged and then raises to around 2500 RPM at the stop in neutral, I used this site to fix my problem and IT WORKED! I had a combination of a filthy IAC valve and throttle body as well as ten pin connectors. Thanks very much for your posts, they really did the trick for me. I wish you all the best of luck with your idling situations.