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Thread: Billet Inline 12-1400 Second Pump Not Pumping

  1. #1

    Default Billet Inline 12-1400 Second Pump Not Pumping

    This pump has 2 separate internal pumps that are meant to operate independently as well as together.

    I'm having no luck operating the second pump by itself with the primary disconnected. This was the main reason for purchasing this pump to have a back-up should the primary fail.

    The primary pump (Red and Black wires) works fine, pump primes, pressure comes up, pump can be heard "loading up". Car runs and drives fine.

    With just the Secondary pump connected (Orange and Brown wires) it does not pressurize the system, pump can be heard operating but does not "load up", and fuel pressure remains at Zero. I even loosened a fitting to see if fuel would squirt out, and nothing.

    The pump is setup correctly as instructed, and is mounted below the tank. So it is being gravity fed, and it is -10AN IN & OUT, with pre & post filters all -10AN up to the regulator, at which point it is stepped to -8AN.

    Pump was purchased last week brand new.
    Am I missing something or is this a faulty unit? Thanks.

  2. #2
    Join Date
    Dec 2009


    If you have a defective Holley product, contact Holley Tech. (Holley 12-1400 Dominator Billet Fuel Pump) (Interesting Forum Post - Pump Disassembled Pictures) (Interesting Product - Dual Port End Housing)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, 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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