Holley EFI
To start viewing messages, select the forum that you want to visit from the selection below. Please be aware that this is a community forum. Although Holley employees will take part in …
V2 EFI software upgrade on Gen 1. - Holley Performance Products …
Jun 12, 2024 · I just noticed that the V2 EFI software supports both Sniper 1 & 2, but I saw the note in the overview that say call Holley because V1.3 needs a special update. Is the …
Engine stalls after a few seconds. - Holley Performance Products …
Jan 9, 2023 · Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not …
Universal Terminator X - Holley Performance Products Forums
Jun 21, 2021 · Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not …
First Start - Backfire Through Intake - FIXED - Holley Performance ...
Jul 7, 2025 · First time posting. New Terminator X Max install on rebuilt engine. 6.0L LQ9. I get a nasty backfire right away, when I crank the engine over. I'm using the preconfigured Holley …
Sniper CAN Bus Data Stream Channel Allocations - Holley …
Aug 14, 2024 · I did manage to CAN Bus Data Stream Channel Allocations from the Cable Adapter Instructions (280-CA-EFIHOLMX), which also suit Holley Dominator & HP ECUs, but …
Selecting pump flow rate for EFI application? - Holley Performance ...
Feb 5, 2025 · The Holley Sniper 1100 has one 100 lb/hr injector. That 100 lb/hr calculates to about 15~16 gallons/hr, or 60~65 liter/hr. Does Holley have a recommendation for a pump with …
Pump gas 93 to E85 conversion? - Holley Performance Products …
I have a turbo 5.3L LS running Terminator X on 93 octane pump gas. It's been running great for over two years. I want to convert my fuel system to E85. What's the procedure within the …
Fuel pump relay wiring question. - Holley Performance Products …
Aug 9, 2021 · The fuse location in the Holley harness is tantamount to useless in this regard. Yeah, I noticed that with the Holley harness for the fuel pump. I'll have to work in a fuse …
Sniper starts & dies. Lean AFR. - Holley Performance Products …
Jun 14, 2025 · New problem with a formerly functioning setup. Holley 550-544 Sniper XFlow and timing control with the Holley distributor. The system has been in service since 2020 and …