Squeegy410 Posted February 4, 2010 Share Posted February 4, 2010 Ever sence I bought my MJ it has had this problem. Some times when I start it it will rev up really high until I get it in gear, then when I clutch it it revs up again. I found recently if I push the throttle and get the rpms even higher than they are and let them fall back down it stops, but what causes this? Link to comment Share on other sites More sharing options...
Geonovast Posted February 4, 2010 Share Posted February 4, 2010 Sticking IAC is most likely, but it could be an o2 sensor. Pop your IAC out and scrub it down with TB cleaner. Also check around for vacuum leaks. Link to comment Share on other sites More sharing options...
Squeegy410 Posted February 5, 2010 Author Share Posted February 5, 2010 sorry for ignorance but what exactly is an IAC and where would I find it? Link to comment Share on other sites More sharing options...
1986Comanche Posted February 5, 2010 Share Posted February 5, 2010 sorry for ignorance but what exactly is an IAC and where would I find it? IAC stands for Idle Air Control. The IAC is located on the front of the throttle body and to the left of the TPS (Throttle Position Sensor). Here's a picture showing the IAC and TPS. I hope this info helps. Link to comment Share on other sites More sharing options...
Squeegy410 Posted February 8, 2010 Author Share Posted February 8, 2010 anything i should know about it before i started trying to take it off and stuff? Link to comment Share on other sites More sharing options...
jpdocdave Posted February 8, 2010 Share Posted February 8, 2010 sometimes its held on by torx. Link to comment Share on other sites More sharing options...
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