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Dead injector on Sniper.

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  • #31
    At idle, should all four have fuel flowing, or just the front two? Mine sounds like a jet engine, but no fuel out of drivers front (or rear two) at idle.

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    • #32
      Depends if you have it set up as 1:1 or progressive. Also depends on the model of Sniper.

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      • #33
        Yes, the Sniper EFI operates all four fuel injectors with a 1:1 secondary throttle linkage. See "Progressive Throttle Linkage" in EFI Parameters.
        May God's grace bless you in the Lord Jesus Christ.
        '92 Ford Mustang GT: 385"/6.3L SBF, Dart SHP 8.2 block, forged steel crankshaft & H-beam rods, forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/.623" lift/114° LSA camshaft, TFS R-Series FTI Comp Ported intake, BBK 80mm throttle body, Holley Dominator MPFI & DIS, Holley 36-1 crank trigger, MSD 1x cam sync, PA PMGR starter, PA 200A 3G alternator, Optima 34/78 Red battery, 100HP progressive dry direct-port NOS, R134a A/C, Spal Dual 12" HP 3168 CFM fans, Frostbite 3-core aluminum radiator, Pypes dual 2.5" exhaust, off-road X-pipe, shorty headers, Earl's -6AN fuel system plumbing, Walbro 255 LPH in-tank pump & Pro-M -6AN hanger, S&W subframe connectors, BMR upper & lower torque box reinforcements, LenTech Strip Terminator wide-ratio Ford AOD, 10" 3000 RPM C6 billet converter, B&M Hammer shifter, Stifflers transmission crossmember & driveshaft safety loop, FPP aluminum driveshaft, FPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 M/T Street Comp tires.

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        • #34
          I'm using the progressive linkage, and have it set at 47% where the secondary blades start to open.

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          • #35
            Then only the two front primaries will inject fuel at idle.
            May God's grace bless you in the Lord Jesus Christ.
            '92 Ford Mustang GT: 385"/6.3L SBF, Dart SHP 8.2 block, forged steel crankshaft & H-beam rods, forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/.623" lift/114° LSA camshaft, TFS R-Series FTI Comp Ported intake, BBK 80mm throttle body, Holley Dominator MPFI & DIS, Holley 36-1 crank trigger, MSD 1x cam sync, PA PMGR starter, PA 200A 3G alternator, Optima 34/78 Red battery, 100HP progressive dry direct-port NOS, R134a A/C, Spal Dual 12" HP 3168 CFM fans, Frostbite 3-core aluminum radiator, Pypes dual 2.5" exhaust, off-road X-pipe, shorty headers, Earl's -6AN fuel system plumbing, Walbro 255 LPH in-tank pump & Pro-M -6AN hanger, S&W subframe connectors, BMR upper & lower torque box reinforcements, LenTech Strip Terminator wide-ratio Ford AOD, 10" 3000 RPM C6 billet converter, B&M Hammer shifter, Stifflers transmission crossmember & driveshaft safety loop, FPP aluminum driveshaft, FPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 M/T Street Comp tires.

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            • #36
              How do you access these connectors to check the front panel on the Sniper?

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              • #37
                Post # 12 has a picture: https://forums.holley.com/showthread...900#post231900. You may want to read the entire thread. The injectors are accessed from the sides, not the front or rear.

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                • #38
                  My passenger front wasn't squirting. I swapped the left and right front injectors, to confirm the injector was bad or not. All four injectors needed the pins aligned with the receiver inside the plug. Then I added a zip ties to make sure it doesn't come loose. All four are working correctly.

                  On the 550-872 that I have. New fuel injector: https://www.holley.com/products/fuel...parts/522-101X
                  Last edited by 69Charger; 11-29-2022, 09:21 PM.
                  1969 Charger R/T SE 440 Magnum

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