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Thread: Not making power after running out of gas.

  1. #11


    Ya, I know how they work. Half my cars have EFI systems. Just didn’t know if this system still fed off a bowl or was under pressure like all other systems. I get that.
    So the bowl “looking” parts on this system act like a fuel rial on my Hellcat, Mustang, STI, and not like the bowls on my 440 Dart, K5 Blazer and my '63 Cadillac.
    If the problem was air, it'd be out after half a tank anyway. Probably a pump, too consistent to be crap in the tank. Can I add a photo?

    Found the pump it’s an in-line pump. Looks like part number 12-920 on the Holley website. I want to run the best pump I can. I don’t even know what Sniper I have. It’s looks like a Holley 750. It’s a 350 small block, probably mild cam. It was set up for Zex nitrous, but never used.

  2. #12
    Join Date
    Dec 2009


    The Holley 550-510K Sniper EFI Master Kit instruction manual states it's this one: (MSD 2225 Fuel Pump)
    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 crank & rods, forged pistons, Trick Flow T/W 11R 205 CNC comp ported heads, 12:1 comp ratio, 232°-244° duration/.623" lift/114° LSA camshaft, TFS R-Series FTI comp ported intake, BBK 80mm T/B, Holley Dominator MPFI & DIS, Holley 36-1 crank trigger, MSD 1x cam sync, PA PMGR starter, PA 200A 3G alternator, Optima Red battery, 100HP progressive dry direct-port NOS, R134a A/C, Spal dual 12" 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 AOD, 3000 RPM C6 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.

  3. #13


    Thank you so much. Looks like one side of this pump uses a clamp. I have aluminum fittings on both sides. I don't know if the outlet side barb can be remove or if there's an option for a pump that I can use the fitting already there. Thanks, Larry

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