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Don,
> Finally I'd remove the CIS motor (idle air valve) and wash through it
> with carb cleaner to wash out any gum 'n gunk. If the motor is
> electrically worn, it must be replaced. Be certain the electrical
> connector is clean and that the lugs are shiny.
Have you ever tried to repair this motor electrically?
From my '86 sedan, I found the commutator (?) (that is, the small diameter silver hub that the three copper contacts ride on near the bottom of the can) was worn in three spots. The copper contacts had worn three cupped gouges in the silver commutator.
Having nothing to lose, I tried to float electrical solder into those depressions and build them up with the solder. Then I hand sanded them so the entire circunfrence was smooth and shiney.
The motor actually worked for a couple of minutes. then, suddenly, something changed and the engine began racing above 2500-3000 as idle speed.
(you may have seen my posts a couple of weeks ago about "Fast Idle Whoooooas")
Still have this problem, eventhough I installed two different ICV's.
Out of desperation, I switched the ICV connector with the one from the TPS, and this slowed the idle to about 950-1100.
P.S. My classmate who engineers Cadillac, Olds and Buick said they farm out their technical writing. He didn't have anything for your thesis.
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