Results 1 to 4 of 4

Thread: Dominator EFI ZZ502

  1. #1

    Default Dominator EFI ZZ502

    I installed a Dominator EFI on a ZZ502 with a 4x crank reluctor from a 7.4L in the factory cover, MSD cam sensor set at 195°, Custom, 1 Pulse/Fire, Inductive Delay 100.00 usec, Digital Rising, Reference Angle set to 60°, cam sensor Single Pulse, Digital Rising and output setup DIS Coil-On-Plug Dwell Time 3,0 msec. It's a Coil-Near-Plug and I pinned check the harness to verify the wiring was correct to each coil. When I crank the engine it backfires through the intake and kicks back like it's way advanced or the firing order is wrong! The firing order is set to 18436572 standard and I called Cam Motion who did a custom grind cam and they verified the stock and not an LSx grind. Could the Reference Angle be wrong or any help would be appreciated! Thanks Rick!

  2. #2
    Join Date
    Dec 2009

    Default (Ignition Timing Synchronization)
    CNP/COP/DIS & single coil/distributor ignition synchronization verification & troubleshooting information at the end of post #1.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 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, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, 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 & 245/45R17 M/T Street Comp tires.

  3. #3


    Sounds like a super slick setup!
    Before trying to start the engine, you need to verify timing and if it is off, synchronize it. Danny linked you to all the important information. Andrew

  4. #4


    Thanks for the replies! I went through the link Danny sent, but it sure does not make sense! I tried setting the cam sensor as you would a distributor and checked the timing, but it was so erratic that the only way it would find 15° of timing was to change the Reference Angle to 80 and I have no idea where the cam sensor is at now. I thought the cam sensor was to be set at a fixed setting and not adjusted for timing? It still will not start and still acts like the tiiming or firing order are way off. Sometimes it acts like it wants to run then the next time I crank it, it seems so far off of timing or firing order?

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