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Thread: Dominator used as piggyback.

  1. #1

    Default Dominator used as piggyback.

    Hi. I'm wondering if I can piggyback sensor signals from a '94 Mustang and use a Dominator to control engine & transmission. I'm trying not to lose factory dash and A/C controls. Thanks.

  2. #2
    Join Date
    Dec 2009


    Yes, if they're Hall-Effect sensors (3-wire, 0-12V), the signal wire can be split to two devices. Also, the Holley EFI system must use the Holley EFI WBO2 sensor. It's a proprietary wideband O2 sensor (LINK), specifically made & calibrated for Holley EFI.
    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/3000 RPM converter, FPP aluminum driveshaft, FPP 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 & MT 245/45R17 tires.

  3. #3


    Yep, I did it on my 2011 GMC, needed to keep the factory ECU to retain all the CAN Bus signals so piggy backed the Dominator and everything works perfect. You wouldn't know I had a Holley ECU if I didn't tell you.

  4. #4


    Three GMC, did you just simply split the cam & crank signals, or did you just not run them to the factory Ecuador’s?

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