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Thread: IAC & Hilborn Setup

  1. #1

    Default IAC & Hilborn Setup

    Deleting my last post and creating a new question based on additional due diligence. So the Hilborn setup does not use an IAC valve. With this being the case, how should I adjust the IAC Position setting and what the target numbers are? Thank you!
    Last edited by jb427; 04-14-2019 at 06:02 PM. Reason: Changed question after further research.

  2. #2

    Default

    Don’t bother with the IAC settings. I’ve got a converted Enderle manifold on my coupe and made no provision for the IAC, and it runs perfect.

  3. #3
    Join Date
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    Default

    Quote Originally Posted by jb427 View Post
    So the Hilborn setup does not use an IAC valve. With this being the case, how should I adjust the IAC Position setting and what the target numbers are?
    If you don't have an IAC valve, then simply ignore the IAC control parameters because they don't apply. Select "None" under IAC Type, IAC Control (Idle ICF).
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  4. #4

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    OK, I changed the IAC Type to "None". What should I do with the IAC Ramp Down and Startup IAC Settings? I definitely have an idle issue after the car warms up. The idle won't drop back down to the target idle or even stall when the idle screw is back out. Target is 950 and it idles around 1350. I tried changing to Open Loop at idle thinking the large cam may have been causing the problem. But to get the idle to a normal range, I have to lean the engine upwards of an AFR of 21. Clearly that's not right. Any thoughts?

  5. #5
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    Quote Originally Posted by jb427 View Post
    OK, I changed the IAC Type to "None". What should I do with the IAC Ramp Down and Startup IAC Settings?
    Ignore them.

    I definitely have an idle issue after the car warms up. The idle won't drop back down to the target idle or even stall when the idle screw is back out.
    Maybe a vacuum leak.

    But to get the idle to a normal range, I have to lean the engine upwards of an AFR of 21. Clearly that's not right. Any thoughts?
    Failed WBO2 sensor corrupted Learn Table (unusual %)?
    Exhaust leaks upstream of the WBO2 sensor?
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

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