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**Desert1957** · 07-29-2017, 03:48 PM

3300 RPM? sure seems like a throttle plate issue in the TBI itself, Iv'e never seen anything related to sensors or a vacuum leak keep the idle that high. Still think its related to a worn, bent or stuck throttle shaft not letting the plates close all the way. very unusual.

Only other thing (I'm sure you have checked) is the throttle body mounting base gasket, these are notorious for sucking air.
spraying around the base doesn't always find the leak, take it off and inspect it.

07-29-2017, 03:48 PM	#15
Desert1957 Registered User Join Date: Apr 2009 Location: New Freedom Pa. Posts: 1,335	Re: Iac maybe? 3300 RPM? sure seems like a throttle plate issue in the TBI itself, Iv'e never seen anything related to sensors or a vacuum leak keep the idle that high. Still think its related to a worn, bent or stuck throttle shaft not letting the plates close all the way. very unusual. Only other thing (I'm sure you have checked) is the throttle body mounting base gasket, these are notorious for sucking air. spraying around the base doesn't always find the leak, take it off and inspect it. __________________ Desert Last edited by Desert1957; 07-29-2017 at 03:55 PM.