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  1. Holley Performance Products Forums

    Holley Performance Products Forums

  2. Fuel Pump - heat soak seized? - Holley Performance Products Forums

    Contact Chris Myer at EFISystemPro.com. He's a Holley EFI parts professional, Holley EFI Dealer & fuel pump/fuel system specialist. Originally Posted by Danny Cabral I wouldn't use a big 340 or larger …

  3. Progressive Linkage makes Sniper EFI WAAAY Better - Holley …

    The fact that Holley released new firmware for the Sniper EFI System recently slipped past most existing owners. And while I am not one to recommend upgrading firmware just because it is there, the new …

  4. Terminator/HP No Start Issue - Holley Performance Products Forums

    Jul 6, 2017 · 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 …

  5. Sniper with ICE Ignition - Holley Performance Products Forums

    Aug 17, 2017 · 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 …

  6. Sniper QuadraJet, can't set IAC Position - forums.holley.com

    Nov 27, 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 …

  7. Difference between 553-108 & 553-115 handhelds? - Holley …

    Oct 12, 2021 · I have the 553-115 handheld on my Sniper system. I came across Holley handheld model 553-108. This one seems to offer more options. Would the model 553-108 work with my 4150 …

  8. Idle goes lean and dies. - Holley Performance Products Forums

    Apr 5, 2022 · I didn't either, until I freaked out and called Holley about mine. I think that's one of the reasons it's so tricky tuning the off-idle and "return to idle" areas of these units.

  9. AFR Lean Spikes at Idle - Holley Performance Products Forums

    Dec 7, 2022 · Hello everyone, I'm having some lean AFR spikes during hot idle. I'm using my Holley Sniper on a 1973 VW Super Beetle. Sometimes the ECU will recover, other times, the engine dies. …

  10. Holley Sniper O2 sensor replacement - Club Cobra

    Sep 28, 2020 · Holley part number 554-155. Anyone have a good place to find a genuine Bosch O2 replacement sensor without paying $110?