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Fuel Pump Dying?

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  • #1

    Fuel Pump Dying?

    How would you know?

    My car was shut down for a week while I sent her PCM to be flashed. I installed the PCM back in and took a drive. Everything ran like clock work, but I noticed a hmmming-whine from the back. I put my ears over the tank and sure enough its coming from the fuel pump region. Can't be anything else except for the pump.

    It comes on periodically and ever so faint. There isn't any spuddering and she feels fine...

    I'm a little tight on money so I don't want to spend the cash on a new pump...you think this whine is indication that the pump is about to go?

    Start up fine also, you can hear it prime the lines and injectors.

    Thanks fellas...

    Christopher Teng

    1999 · A4 · 3.73's · Auburn LSD · Whisper Lid · K&N · Pacesetter Headers/Y-pipe
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    F-Body Dirty Dozen
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  • #2
    how much gas is in the tank? also, a dirty clogged pump will whine because it's trying to suck fuel through debri.
    97 Chevy 'Raro Z28 M6- Ported & Polished LT1 heads,beehives,1.6/1.94 valves, 226/231 custom cam,K&N FIPK, 94-95 BBK shorty's,ORY,Magnaflow Catback,no cats,BMR LCA Relocation Brackets,Lower Control Arms,Adjustable Panhard Bar,Eibach Pro Kit,SPEC Stage 1,Walbro 255 Fuel Pump,30LB Injectors,Pro 5.0,Short stick,MSD 8.5's,NGK TR55's,LT4KM

    01 Honda CBR600 F4i-Two bro's,Corbins,SS brake lines

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    • #3
      Put a fuel pressure gauge on it, and look for at least 40psi at max engine load/RPM. Anything less than that and you have a problem with the pump, the filter or the regulator.
      Fred

      381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

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