IAC

[Frederic Breitwieser]

>Not anymore.  IAC motors today are usually stepper motors that move a pintle
>in a bypass air hole to control the extra airflow necessary with various
loads
>or age.  These are typically the 4 wire setups.

Thanks for the clarification... helps me out a lot actually.

>I have heard of a PWM valve being used, but I have never actually seen
one.  Maybe
>this is what the Ford is using that only has 2 wires.

I've played with these type of motors in the past, by increasing the duty
cycle on the pulse, the motor turns further.  Actually, the device I had
was more of a solinoid type of thing.
Frederic Breitwieser
Homebrew Automotive Mailing List
Bridgeport, CT 06606
http://www.geocities.com/MotorCity/Downs/4605/index.html
(Portable Webserver Link Address)

1989 AG Hummer 4-Door
1993 Supercharged Lincoln Continental
2000 Mid-Engine Sports Car <smile>

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