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Thread: 534-55 Pro-Jection ECU

  1. #1

    Default 534-55 Pro-Jection ECU

    Hi there. Holley discontinued this 534-55 ECU. I try to buy new or used or rebuild no luck. Do you have any sources where to find one? Or know somebody who can fix it, or share a PDF with the electronics inside that box? I ordered the new Sniper, but delivery is September 30, maybe. Thank you.

  2. #2
    Join Date
    Dec 2009


    Quote Originally Posted by 7313101 View Post
    Do you have any sources where to find one?
    If you find one, it will probably be used, and I wouldn't trust it (since it's such an antiquated EFI system).

    Or know somebody who can fix it, or share a PDF with the electronics inside that box?
    That's not happening, but you can disassemble it and look inside for any obvious failure.
    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


    Thanks Danny, I guess I'll wait for the new Sniper. Not enough time to investigate, plus no electronic diagram, I'll be lost in there. All the best. Alex

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