Results 1 to 3 of 3

Thread: Miserable experience upgrading firmware.

  1. #1

    Default Miserable experience upgrading firmware.

    As per instructions, went to the website to upgrade the firmware for the Sniper EFI. Downloaded it, moved it to the SD card. Replaced into the screen, turned on ignition. Nothing. No matter what I do, the 3.5" touchscreen keeps saying that the ECU is incompatible with the firmware (or maybe the other way around). Anybody have any experience with this? How in the world can I get over this roadblock? Thanks for any help.

    ECU serial number: 00000001
    Date code 20160317
    ECU firmware version 1.0.90
    Profile number :1

  2. #2


    Holley does not have firmware upgrade for the Sniper, but they do have it for the other ECUs. Clear you SD card and download this and it will work: PS: Do you have the first Sniper ECU Holley ever made?

  3. #3

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