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high idle is a function of engine temp 200 1990

posted by  matt82dl on  Mon Feb 12 14:00 CST 2007
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last visit: Mon Oct 13 10:46 CST 2014
[RELATED]

A few days ago my car started idling at 1500rpm. It only does this when hot, in fact, it will idle somewhere between 900 and 1500 depending on engine temp.

I did the easy stuff:

checked the TPS switch -- OK
Cleaned the idle control valve -- Done

I'm thinking it might be related to the coolant temp sensor??? Does this sensor input have anything to do with idle speed.

Thanks in advance

matt
--
'90 245 215k, '93 945 176k






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