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Old 11-12-2008, 07:25 PM
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high idle when cold ...and warm

ok i just bought a 1990 wrangler 6 cylinder automatic, was runnibg rough when i got so i did a good tune up,wires plugs ,rotor ,cap,pcv valve replaced all vacum lines ,air filter , fuel filter, now runs like a top ...except when jeep is cold and I start it up it starts right up but at a very high idle , for a couple of minutes ..ok normal..but when i turn off after jeep is warm ,and start up again , while warm , high idle again every time , even after driving for 30 plus minutes , tap accelerator and goes back to normal idle.

any thoughts???
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Old 11-12-2008, 07:40 PM   #2
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i was having a high idle, maybe something with the IAC valve? But mine idled high at start up, and when you even lightly tapped the accelerator for like a second, it reved up to 2k rpms and stayed there for a couple seconds, then slowly came back down

1994 Jeep YJ SE
6 cyl. 4.0 HO
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Old 11-23-2008, 09:03 AM   #3
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do you have fuel injection or a carb
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