Results 1 to 3 of 3

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.

    '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. #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

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
About us
Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR® Sprint® Cup team and nearly every NHRA® Pro–Stock champion for four decades. Now, Holley EFI is dominating the performance world as well as our products for GM's LS engine. Holley's products also include performance fuel pumps, intake manifolds & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies - Hooker Headers, Flowtech Headers, NOS Nitrous, Weiand, Earl's Performance Plumbing, or Diablosport - Holley products can give you the edge you need over the competition.
Join us