Replaced IAC - now super high idle (Page 2/2) Kitskaboodle NOV 23, 10:40 PM Ok, understood but at any rate I made no adjustment to the pintle length. I did notice that my new one seemed retracted all the way in and the one I took out was pretty much fully extended. Maybe this is why I did not have to make any adjustment. Also, I thought the computer determined the extension or retraction amount?? Kit Kitskaboodle NOV 23, 10:41 PM Ok, understood but at any rate I made no adjustment to the pintle length. I did notice that my new one seemed retracted all the way in and the one I took out was pretty much fully extended. Maybe this is why I did not have to make any adjustment. Also, I thought the computer determined the extension or retraction amount?? Kit fierofool NOV 24, 09:49 AM The ECM does determine the length, but if the pintle is extended too long upon installation, it bottoms out on the seat in the throttle body. Then as you tighten down the sensor, it can damage the shaft or the internals of the IAC. Manually retracting it to 1 1/8 inch assures it won't bottom out on installation. Most I've seen coming out of the box are extended too far. Glad yours wasn't. Kitskaboodle NOV 24, 10:53 AM Ok, I see. Thanks for explaining that. I have seen IAC’s apart and the collar that holds the shaft, spring and pintle together is often plastic so I can see how they can get damaged if fully extended before installation. Totally get it now. Thanks, Kit