I just realized the Holley Commander 950 throttle bodies (1,000 cfm 4bbl) use MOPAR Iac valves...

I've used 3 of these in combos over the years and always had trouble with idle.. Never thought to check if it was an actual GM IAC..

Apparently the pinouts are different..

Anyone know of a PWM iac that will use this mounting pattern? The Ford's all look huge.

-- Joe

 

i have one from my mustang TB i can look at, iirc its actually a little smaller

 

That would be cool. Does it appear to use the same mounting pattern?

I noticed some fords have a two piece, so the iac actually bolts to the housing which in turn bolts to the intake.

-- Joe

 

That looks identical to Holley 4 barrel TBI units and stock Chevy BB IAC...

http://www.rockauto.com/catalog/moreinfo.php?pk=88845

 

It is, I found the difference between the Mopar and GM is simply the pinout.

http://www.megamanual.com/ms2/ewIAC.gif

-- Joe

 

Must be wrong link?

Even some of the screw in IAC have 2 wires crossed between SB and BB in wiring diagams.

 

Must be why some of the folks say to change the pinouts when going from different code masks.

-- Joe

 

Don't know if this will help you or not.

http://www.chevytalk.org/fusionbb/sh...hp?tid/245452/

 

The above is only for the early HP and Dominator ECMs

 

The Holley body IAC's are 4 pins in a row ---- GM is square _ _
_ _

The Holley ones are Standard Motor Parts # AC416 around $55 dollars (2000 Dodge Ram 1500 if I remember) The Standard Part# is correct for sure tho.