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high idle issue

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Old 07-08-11, 11:33 AM
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ffkill3rfc3s
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high idle issue

my 88 fc while constantly stays at 2k rpms. no vacume leak though. i was told it could be my iac valve or bac. any advice?
Old 07-08-11, 04:39 PM
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Stuck throttle cable or someone has played with the throttle stop on the TB.
Old 07-09-11, 11:02 AM
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ffkill3rfc3s
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I messed with the throttle to see what was up. Didn't have any play to it seemed normal. But I lift the throttle not even a cm. And the idle went to normal.
Old 07-09-11, 12:24 PM
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Cars with cruise control also have a throttle cable that could contribute to high idle.
Old 07-09-11, 12:56 PM
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Originally Posted by ffkill3rfc3s
Didn't have any play to it seemed normal.
the cable should have a little bit of slack in it.
But I lift the throttle not even a cm. And the idle went to normal.
then something isn't allowing it to rest on the stop.
Old 07-10-11, 01:28 AM
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ffkill3rfc3s
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i dont have cruise control. ill check the throttle cable tomorrow again. i went ahead and ordered new hoses and im picking up a BAC off a dude here in town tomorrow to see if that works.
Old 07-10-11, 09:56 AM
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Engine, Not Motor

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An idle that high has always been a mechanical issue with the throttle body, in my experience. For example, the cold start cam could be suck. Or the throttle cable could be wrapped around the shaft, etc.
Old 07-10-11, 09:58 AM
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ON 92 fast idle

My 92 had a fast idle problem when I bought it, but I just took it back to the shop where I bought it and they fixed it. Should have asked what they did.
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