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 answering …

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 update worth doing …

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 guarantee an …

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 guarantee an …

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 GCF tune as a …

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 can see from …

Oct 31, 2015 · Holley EFI Software HotKeys for Quick Keyboard Navigaton 10-31-2015, 11:50 AM Several people have asked me if there were any Hot Keys in the EFI software, to make

Aug 27, 2022 · I'm confused how the fuel pump relay on the Holley EFI main harness works (probably because I'm new to understanding relays in general). It looks like pins 85 & 86 are connected to …

Jun 21, 2025 · I have the engine running now. When datalogging and looking at the AFR it jumps around when touching the throttle. I'm guessing it's Acceleration Enrichment that is way off? I took a look at …