dracon79 Posted February 1, 2009 Share Posted February 1, 2009 The first start is usually always good. But after that like around town it wants sometimes to go to like almost 3000 rpms when I go to start it and I have to shut it down then restart then it goes away. Its a very intermittent thing. 1988 comanche 4.0 5 speed manual i replaced the egr, injectors, plugs, cap. TPS and ICU about a year old now both are neighoffs. I replaced the cps as well. In fact I have replaced everything but the computer and the map sensor. Link to comment Share on other sites More sharing options...
aemsee Posted February 1, 2009 Share Posted February 1, 2009 Could be a problem with the IAC. I'ld pull it out and clean the pintle and bore good and try it before I replaced anything else. Link to comment Share on other sites More sharing options...
Pete M Posted February 1, 2009 Share Posted February 1, 2009 Or the TPS. I also would start by cleaning the throttle body area and sensors with an o2-safe cleaner. :thumbsup: Link to comment Share on other sites More sharing options...
manche Posted February 1, 2009 Share Posted February 1, 2009 also make sure if you throttle cable is not sticking mine was idling abtu 1300 rpms then found the cable was sticking in insulation Link to comment Share on other sites More sharing options...
BLHTAZ Posted February 1, 2009 Share Posted February 1, 2009 Clean the throttle body and IAC real well as suggested. If that doesn't help, then you are likely having an issue with the IAC itself. I had the same issue, but after spending the money on a new IAC, TPS, MAP Sensor, Temp Sensor etc, etc... I found my problem to be a ground issue on the right side of the block :fs1: Link to comment Share on other sites More sharing options...
dracon79 Posted February 3, 2009 Author Share Posted February 3, 2009 Well I think my throttle cable might be sticking. When I was driving home the other day on the freeway I took my foot off the gas and the truck kept maintaining speed. Well I don't have cruise control. So I don't know if thats an issue with the pedal or the linkage or what? :hmm: Link to comment Share on other sites More sharing options...
JOMJ87 Posted February 3, 2009 Share Posted February 3, 2009 Didnt read all replys but Vacuum leak??? spray some carb cleaner around the lines and if it raises idle look close at it there. Cole Link to comment Share on other sites More sharing options...
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