C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

high cold idle

Old Nov 7, 2016 | 06:33 PM
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Default high cold idle

Hey Guys,

I need help, I have a 1984 Corvette that cold idles at 2300rpm for about 4 minutes and then backs down to around 700rpm at idle in park. The car will run correctly the remainder of the day, however after the engine gets cold we have the high rpm again.

I have changed both idle air control valves and that did not help.

Anyone have any suggestions?

Thanks,

larry9j

Last edited by larry9j; Nov 7, 2016 at 06:34 PM.
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Old Nov 7, 2016 | 07:43 PM
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Welcome to the forum.

For more exposure and responses, post this question in the C4 Performance / Tech area.
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Old Nov 7, 2016 | 07:55 PM
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Originally Posted by rkj427
Welcome to the forum.

For more exposure and responses, post this question in the C4 Performance / Tech area.
https://www.corvetteforum.com/forums...erformance-48/
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Old Nov 7, 2016 | 10:15 PM
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Welcome to the forum!
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Old Nov 8, 2016 | 08:07 AM
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Welcome and good luck with your eighty four!
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Old Nov 8, 2016 | 08:12 PM
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Welcome to the forum.
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Old Nov 10, 2016 | 01:10 AM
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Moved to the C4 Tech area.
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Old Nov 10, 2016 | 07:33 AM
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I'd update the coolant temp sensor & plug in to the newer style. Check for vacuum leaks.
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