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  • #1

    Help with Fuel pressure problem....

    Ok, basically my fuel pressure is good sitting at 42 or so until i go wot and past like 4000rpm to redline the pressure continuously drops to about 30 or a little below.

    Shouldnt it stay at 42??

    I have also a hard start problem, its a real long crank time and my system wont hold pressure when not in use.

    Ive replaced fuel filter and pressure regulator and have 6 new 24# injectors (I also have P&Ped heads and GT2 cam with a texas speed tune)

    HELLLLPPPP
    SLP CAI, RK Sport headers, P&Ped heads and intake, GT2 cam, Upgraded valvetrain, Z28 rear axle with 4.10s Tx Spd tune, Z06 rims, 2.5\" exhaust to flowmaster, 160* thermo, B&M ripper, upgraded ignition, rockford fosgate 12\" with sony xplode amp and HU.
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  • #2
    Re: Help with Fuel pressure problem....

    umm maybe fuel pump is week
    www.turbov6camaro.com
    1997 3800 Series II Camaro
    4600 Stall for my ride to the mall :chug:
    7.18 @ 99.77 1/8 -1.8x sixty (current quickest v6 fbod)
    11.23 @ unk 5 1/4 - 7.19 1/8 - 1.83 sixty

    Comment

    • #3
      Re: Help with Fuel pressure problem....

      yeah, I would say fuel pump.
      2000 3.8 A4 Pewter Camaro

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      • #4
        Re: Help with Fuel pressure problem....

        how fst the the PSI bleed off....... you may have a leak
        www.turbov6camaro.com
        1997 3800 Series II Camaro
        4600 Stall for my ride to the mall :chug:
        7.18 @ 99.77 1/8 -1.8x sixty (current quickest v6 fbod)
        11.23 @ unk 5 1/4 - 7.19 1/8 - 1.83 sixty

        Comment

        • #5
          Re: Help with Fuel pressure problem....

          the pressure drops off from 42 to zero in a matter of seconds...

          Is there such thing as a weak fuel pump? Like I said i have to prime the pump like 3 times to get it fired up
          SLP CAI, RK Sport headers, P&Ped heads and intake, GT2 cam, Upgraded valvetrain, Z28 rear axle with 4.10s Tx Spd tune, Z06 rims, 2.5\" exhaust to flowmaster, 160* thermo, B&M ripper, upgraded ignition, rockford fosgate 12\" with sony xplode amp and HU.

          Comment

          • #6
            Re: Help with Fuel pressure problem....

            Originally posted by FuryCharger
            the pressure drops off from 42 to zero in a matter of seconds...

            Is there such thing as a weak fuel pump? Like I said i have to prime the pump like 3 times to get it fired up
            you have a fuel leak some where or you FPR is bad and bleeding off your fuel PSI...

            do you have a walbro ?
            www.turbov6camaro.com
            1997 3800 Series II Camaro
            4600 Stall for my ride to the mall :chug:
            7.18 @ 99.77 1/8 -1.8x sixty (current quickest v6 fbod)
            11.23 @ unk 5 1/4 - 7.19 1/8 - 1.83 sixty

            Comment

            • #7
              Re: Help with Fuel pressure problem....

              No I have the stock pump with 134k on my car. Like I said, I just replaced my FPR and it didnt help the problem, if there was a leak wouldnt there be drips of fuel tho? everything seems to be in good shape.

              im really stuck, fuel pump?
              SLP CAI, RK Sport headers, P&Ped heads and intake, GT2 cam, Upgraded valvetrain, Z28 rear axle with 4.10s Tx Spd tune, Z06 rims, 2.5\" exhaust to flowmaster, 160* thermo, B&M ripper, upgraded ignition, rockford fosgate 12\" with sony xplode amp and HU.

              Comment

              • #8
                Re: Help with Fuel pressure problem....

                I just need to know whether or not to get a walbro or not. im getting robbed of power I believe up top cause my pressure is dropping close to 15 psi near redline
                SLP CAI, RK Sport headers, P&Ped heads and intake, GT2 cam, Upgraded valvetrain, Z28 rear axle with 4.10s Tx Spd tune, Z06 rims, 2.5\" exhaust to flowmaster, 160* thermo, B&M ripper, upgraded ignition, rockford fosgate 12\" with sony xplode amp and HU.

                Comment

                • #9
                  Re: Help with Fuel pressure problem....

                  can you smell gas when you start the engine in the engine bay at all? Any puddles on the intake? Could be a leaky injector, fuel leak somewhere else, or the fuel pump starting to wear out.
                  http://www.bowtiev6.com/

                  Comment

                  • #10
                    Re: Help with Fuel pressure problem....

                    if your fuel PSI is droing that far that is not safe and you have a leak or you fuel pump is about dead......

                    you fuel pressure should not drop off that fast.....
                    www.turbov6camaro.com
                    1997 3800 Series II Camaro
                    4600 Stall for my ride to the mall :chug:
                    7.18 @ 99.77 1/8 -1.8x sixty (current quickest v6 fbod)
                    11.23 @ unk 5 1/4 - 7.19 1/8 - 1.83 sixty

                    Comment

                    • #11
                      Re: Help with Fuel pressure problem....

                      Nope, no fuel that i can tell is leaking from the injectors.

                      Its gotta be the pump, this is confusing as hell
                      SLP CAI, RK Sport headers, P&Ped heads and intake, GT2 cam, Upgraded valvetrain, Z28 rear axle with 4.10s Tx Spd tune, Z06 rims, 2.5\" exhaust to flowmaster, 160* thermo, B&M ripper, upgraded ignition, rockford fosgate 12\" with sony xplode amp and HU.

                      Comment

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