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Very high idle

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Old 07-24-14, 09:54 PM
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Very high idle
I WENT TO START MY 93 FD this morning, and the RPM went to 4000? So I shut it down.
ANY IDEAS?
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Old 07-24-14, 10:21 PM
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Stuck throttle cable or big vacuum leak most likely. I've also had cruise control cables stick.
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Old 07-27-14, 02:28 AM
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Check the throttle so that it's not stuck. Mine got a bit corroded from being stationary for a few months and would not return once opened. Hade to take it out and clean it up.
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Old 07-27-14, 12:31 PM
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Sounds like you still have the AWS working, but that takes RPM's to 3000.
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Old 07-27-14, 12:58 PM
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I'm having the same problem.
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Old 07-27-14, 12:58 PM
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Sounds like vacuum leak check aws hose for cracks or carb cleaner and spray it where gaskets are to find leak idle will rise if it sucks any in needs to be running to do this though
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Old 07-29-14, 08:36 PM
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Another thing to check, make sure the dashpot is set correctly. If not it can hold the throttle open way too far. Happened to me a while ago.

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Old 07-30-14, 01:35 PM
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I had to replace the fiberboard gasket between the LIM and the rotor housing with the later stainless steel gasket, which cured our high idle problem.
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