Jaime Posted August 27, 2011 Share Posted August 27, 2011 Hello I have a problem that started a few days ago. When I start it in the morning it revs really high. I mean a lot higher than the normal rev up. And it won't rev down unless I turn it off two or three times then it settles down. It has also done this in the afternoon when I get ready to go home. I researched this and came up with IAC. What do you think? Also is there a way to test the IAC before I replace it. I tried finding the test in the FSM with no luck. Oh it is an 88 4.0 4x4 ba10. Thank You Jaime Link to comment Share on other sites More sharing options...
Boots Posted August 27, 2011 Share Posted August 27, 2011 I would try taking the IAC out of the throttle body and cleaning it and the hole it goes into. Mine used to idle high, not that high, but I found that the IAC was getting stuck. :wrench: Link to comment Share on other sites More sharing options...
aquiring93 Posted August 27, 2011 Share Posted August 27, 2011 There could also be a leak somewhere in the vacuum line.. Link to comment Share on other sites More sharing options...
Jaime Posted August 29, 2011 Author Share Posted August 29, 2011 Thank you for you help. I tried you suggestion and cleaned the IAC and the hole it goes into and that did the trick. Thanks again Link to comment Share on other sites More sharing options...
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