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IAC Valve: Does it operate only at Fully-Open & Fully-Closed modes, or are there different positions ? 700 1985

uid 18083's pic
posted by  lucid on  Mon Sep 20 13:19 CST 2004
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

I've been through the entire sequence of setting the idle-speed. With throttle-body off..

Sorry, that's not the entire sequence for Idle Speed. Setting throttle stop and TPS is the first part. Next comes the running and use of the test lead to shut the IAC and adjust for 700 rpm with throttle bypass knob (I think I goofed before by saying adjust throttle stop). That is "Base Idle". When the ground is removed, the ECU speeds it up to 750±20.

I'm guessing this is outlined in the FAQ.



--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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