On Fri, 26 Jun 2009 07:34:03 +0100, "Duncan Wood"
wrote:

On Fri, 26 Jun 2009 00:14:42 +0100, Tunku wrote:

Should an engine be able to run with this electrically disconnected, but
still in place?

It depends on how open it sits, almost all the ones I've seen would stall.

Depends on if the system has a base idle setting device or if the idle
air valve is only source of air. Base idle setting may be an air bleed
screw or the good old hold the throttle open a bit on an adjustable
stop. If system has base idle it will be setup, with the idle air
valve unplugged, to an engine speed slighly short of the target rpm.
Then the ECU uses the idle air valve to bring engine speed up to
target.
--
Peter Hill
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