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Fuel pressure loss at wot

This is a discussion on Fuel pressure loss at wot within the General Help forums, part of the LSx Technical Help Section category; I have a 02 ss w/cam,headers,exhaust,intake...etc no nitrous or turbo just bolt ons and small drivetrains add-on. When its on ...

  1. #1
    Junior Member
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    SUNSET ORANGE
    2002 CAMARO SS

    Exclamation Fuel pressure loss at wot

    I have a 02 ss w/cam,headers,exhaust,intake...etc no nitrous or turbo just bolt ons and small drivetrains add-on. When its on idle i have approx 51 lbs of fuel and from take off to about redline, my fuel pressure drops to about 15lbs and stalls. When i let go of the gas it goes up fast back to 51lbs. Its kinda the same issue thru all gears. Only when i wot it, if i let loose from the trottle it starts to runs better but still have like 30 lbs... Im guessing the fuel pump is stock (at least i did not change it) and just cant keep up with the hp. Should i change it or add one on to the existing one? And i've also heard of wiring kits for the fuel pump for more amps... Any ideas?



    SHOULD I PUT ONE IN-LINE FUEL PUMP OR REPLACE THE STOCK?
    Last edited by CAMSS2002; 04-29-2009 at 06:56 AM.

  2. #2
    Impounded
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Sounds like the stock one is taking a dump. I would go with the walbro 255 pump and their wiring kit.

  3. #3
    Senior Member Orcus79's Avatar
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    black
    2002 WS6

    How a bout a new filter, a clogged fuel filter will cause the same restriction in fuel flow and is much cheaper and easier to change.

  4. #4
    Impounded
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Yeah need to do that as well... but you need to replace in the in tank pump.

  5. #5
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    I've seen fuel filters do that many times.

  6. #6
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    black
    2002 camaro Z-28

    Had same issue with my 02 Z-28 changed fuel pump to the 225 and holds steady at about 63-65 psi.

  7. #7
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    SILVER
    2004 CTS-V

    If it is indeed a bad fuel pump, go with the Racetronix kit with the Hot Wire kit. It comes with some very good instructions and is a nice unit.

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