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Funky idle 900 1994

posted by  Mike 94 940T on  Tue Apr 30 03:55 CST 2002
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Hey all,
I have a wierd idle problem that happens from time to time. When my car is cold it idles fine just around 500rpm, when warm for the most part the idle stays the same. I've noticed since I bought my 940T that occasionally I'll get a dip in the idle when I'm sitting at a stop light or at a dead stop. This happens regardless of whether I'm in drive or park. Yesterday I cleaned out my throttle body (it wasn't that dirty) and intake hoses. I didn't clean out the intercooler. They weren't severly crudded up they just had some slight oil residue. I also removed my idle air valve and cleaned that out as well. I took this time to also check out my ground connections as they sometimes crud up and cause wierd problems, and I notice that the idle dipped when the radiator fan cycled on. They also didn't look bad but I cleaned them all up regardless. Then I pulled out my handy dandy digital volt/ohm meter and checked for voltage drop by attaching my positive lead to the battery then touching the various grounding points. They had indentical voltages with the engine off 12.96 and on 14.25. Anyone have any insight to this, my car runs fine just that damn idle drop pisses me off. Thanks and sorry for the long post.
Mike






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