Results 1 to 3 of 3

Thread: Dual Sync LED stays.

  1. #1

    Default Dual Sync LED stays.

    I’ve installed a Holley Dual Sync distributor in my 632 BBC. It’s connected to a Performance Electronics 8400 and no CDI box. My concern is that when rotating the distributor to sync the crank LED dims, but does not go out, upon checking trigger data I shows that both the cam and the crank sensor are sending signal, but it'll randomly pop & die and with a timing light you'll see the top center mark go super advanced. Any idea? I have the distributor ground to the sensor ground, which seems odd since there is +12V going into the distributor. Thanks.

  2. #2


    They made the Dual Sync distributors to be plug & play with Holley EFI units. Have you spoke to your ECU manufacturer to verify compatibility?

  3. Default

    Yes, it'll be good to speak to the ECU manufacturer. Tell the result please.

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