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Thread: Trying to sort through all the IAC wiring info and other random questions.

  1. #11

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    Quote Originally Posted by Danny Cabral View Post
    Yes, the Chrysler & GM IAC motor are physically the same (interchangeable), but they're wired differently. C'mon, this topic has been beat to death.
    Actually Danny, don't mean to irritate you, but they aren't physically identical. One of the holes on the Chrysler IAC is slightly offset from the GM IAC, so you have to do a little minor massaging of the one hole in order to get both screws installed on the Accufab adapter for GM style. Found this out when I went to install the Chrysler IAC into the adapter. Just saying. Hopefully others will find this topic and get the heads-up.

  2. #12
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    No problem at all. Thanks for the additional information.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #13

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    OK, I changed the harness to the square 4-pin GM connector and wired it as per instructions, and I'm not getting any "action" out of the IAC stepper motor. I selected the Holley Stealth Ram control option. Is that the correct one?

  4. #14
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    If it's the IAC motor pictured directly above this, then yes: http://forums.holley.com/showthread....neral-IAC-Info (Scroll down to "IAC Motor Harness Connector PIN-OUTS".)
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  5. #15

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    It's this one:
    Quote Originally Posted by Danny Cabral
    GM Screw-In (threaded) IAC stepper motor pin-out with square connector (Stealth Ram/TPI):
    Use a magnifying glass to see the four IAC connector cavities - designated A, B, C, D.
    These letters are located where the wire seal retainer clips to the connector body (C & D behind retainer).
    The four wires are A: purple/yellow "A HI", B: purple/blue "A LO", C: purple/black "B HI", D: purple/white "B LO".
    http://documents.holley.com/techlibr...10555rev17.pdf (Holley EFI Wiring Manual - page 39)
    http://forums.holley.com/showthread....y-HP-Dominator (Early harness wiring error.)

  6. #16
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    Yes, that's the correct Advanced Idle Control selection.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  7. #17

  8. #18

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    It did indeed! Despite triple-checking myself, I ended up having the high & low swapped on both coils. Works now. Well, the IAC valve functions anyway. The idle is now quite unstable and I've got some tuning time ahead of me. LOL.

  9. #19

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    Glad to help. That IAC note is on my website under Holley Tech.

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