[Bruce Plecan]

All the newer TBI GM IAC is done with a stepper motor and pintle on the end
to bypass air.   On some of the TPI stuff the IAC is on a removeable
housing, so you could make a remote IAC with one of those housings, a plate
of AL, and a pipe tap.
Bruce


> Question: How is idle speed controlled on the standard GM two barrel
> throttle bodies? I looked around the junk yard and could not see an idle
> speed controller on any of the two barrel units but I do not think I saw
any
> non Caddy TB's. I think I saw some on some one barrel units. Is there an
> external ISC that I might be able to use that just regulates the amount of
> air  that bypasses the throttle? The hybrid throttle body I have produced
> seems to have a provision for manual idles speed setting only?


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