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Fast idle problems

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Old Oct 23, 2006 | 08:24 PM
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Default Fast idle problems

I have a 67, 327 4sp.and have a hard time getting the idle to come down to 750RPM, it wants to stay up at the 1000 rpm level. I have a Eldrbrook carb and it is off the high cam from the choke and the idle set screw is set at 750rpm. I seem to only get the idle down when I come to a stop and let the clutch out with the brake on and then it will come down and stay down until I step on the gas peddle. The carb. linkage seem to be OK. it worked good at the beginning of the summer when I put this carb. on.
Chuck
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Old Oct 23, 2006 | 09:34 PM
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Originally Posted by 67green
I have a 67, 327 4sp.and have a hard time getting the idle to come down to 750RPM, it wants to stay up at the 1000 rpm level. I have a Eldrbrook carb and it is off the high cam from the choke and the idle set screw is set at 750rpm. I seem to only get the idle down when I come to a stop and let the clutch out with the brake on and then it will come down and stay down until I step on the gas peddle. The carb. linkage seem to be OK. it worked good at the beginning of the summer when I put this carb. on.
Chuck
Sounds like the centrifugal advance or the vacuum advance is keeping the timing advanced and increasing the idle speed. I would check to see if the centrifugal advance or the vacuum advance mechanisms are hanging up.
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Old Oct 23, 2006 | 10:02 PM
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Sorry, forgot to say I have a MSD ignition..
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Old Oct 24, 2006 | 12:08 PM
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Basics - make sure your throttle linkage is properly adjusted and it isn't hanging up on something, then get into the advance system.
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