[Diy_efi] IAC Motor Wiring

[clair.davis at charter.net]

The Magnum IAC is a stepper motor design, unlike the earlier TBI parts.
This is a dry TB, part of the Magnum multiport arrangement.  I think I left
that tidbit out of my previous post.  I'm so used to thinking about my
particulars, I forget to explain what I'm doing some times...

'7730 multiport injection on Mopar M1 Magnum 4-bbl intake, majority GM
sensors, with some Mopar sensors where needed to work on the TB, Mopar fuel
rails, 24# injectors, Mopar locked (lean-burn) distributor feeding a GM
ignition module in a remote box.

Other than the connector on the end, and the way it mounts to the TB, the
Magnum IAC appears functionally identical to the IAC I have on my GM TB
(converted to dry from a 454 TBI application).  The "LT" engines' IACs
appear to be almost entirely identical to the Mopar part, but the wiring
doesn't seem to be the same.  I'm just wanting to find out if one of the
coils is responsible for extending the piston, the other for retracting, or
if they both do the same job...

Clair

----- Original Message ----- 
From: "Gerald Pelnar" <wd0fyf at cox.net>
To: "A list for Do-It-Yourself EFI" <diy_efi at diy-efi.org>
Sent: Sunday, September 05, 2004 8:00 PM
Subject: Re: [Diy_efi] IAC Motor Wiring


> The Dodge uses a dc motor as a throttle kicker for idle control and is not
> compatible with the GM driver. There were some Cadillacs that used this
kind
> of IAC.  I built an external IAC for mine, but haven't gotten far enough
on
> the project to see how it was going to work.
>  http://members.cox.net/wd0fyf/autoindex.html
>
> Other Mopar owners suggest adapting a GM throttle body.
>
> Gerald Pelnar
> McPherson, KS
> wd0fyf at cox.net
> http://members.cox.net/wd0fyf/
>
> ----- Original Message ----- 
> From: <clair.davis at charter.net>
>
>
> > What I've got is a Dodge Magnum throttle body and associated sensors &
> IAC,
> > all of which I'll be driving with a 7730 ECU.  My understanding is that
> the
> > Mopar IAC is the same one used on the Holley Commander system, and is
also
> > visually identical to the later GM (LT engines) IAC.  I've gotten some
> > wiring info from the archives regarding the LT-1 arrangement, and I've
got
> a
> > small pile of wiring diagrams for the various systems used on GM
vehicles
> > over the years.  Unfortunately, my Mopar wiring diagrams don't show a
coil
> > "A" or "B", just that they ARE coils.  If I get the hi/lo orientation
> > correct but miss on the coils, will the IAC still function properly?
> Seems
> > like it would, but that's usually when I get in to trouble...
> >
> > Thanks,
> > Clair
> >
> > _______________________________________________
> > diy_efi mailing list
> > diy_efi at diy-efi.org
> > http://lists.diy-efi.org/mailman/listinfo/diy_efi
> >
>
> _______________________________________________
> diy_efi mailing list
> diy_efi at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/diy_efi
>

_______________________________________________
diy_efi mailing list
diy_efi at diy-efi.org
http://lists.diy-efi.org/mailman/listinfo/diy_efi