Thread: Fuel pressure drop

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  1. #1 Fuel pressure drop 
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    Hello everyone,
    I have a 00 GTP that is loosing fuel pressure, starts in the upper 40's and drops to 0 in 30 to 45 sec.
    Has new pump and filter, injectors test at 12 ohms, fuel reg test good. both relays test good.
    has anyone come across this before?
    any ideas would help, thanks so much everyone.
    Have a great New Year!
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  2. #2 Re: Fuel pressure drop 
    Killa Bee Scottydoggs's Avatar
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    it dropping car running? or after its turned off?

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  3. #3 Re: Fuel pressure drop 
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    running,
    but same with key on eng. off
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  4. #4 Re: Fuel pressure drop 
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    running and koeo
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  5. #5 Re: Fuel pressure drop 
    Killa Bee Scottydoggs's Avatar
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    does it drive ok? or is it stalling out on ya? they need 42 or more to run.

    if it runs id test the gauge on another car, maybe its bad.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  6. #6 Re: Fuel pressure drop 
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    I belive I have found the problem
    The relay on the frame rail is bad
    No one has one around here not even the dealer
    Waiting till Tuesday until it comes in.
    The car would start and stall, I bought a weak fuel pump too I only have 42 psi.
    But I have the fuel pump in high and it's running know. Thanks for the help though.
    Hopefully this relay I'm waiting on will fix it
    Let you know Next week. Have a great and safe new year
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  7. #7 Re: Fuel pressure drop 
    GrandPrix Junkie ItHurtz's Avatar
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    resistor? no need to run it, twist the wires together and go about your day.
    2000 GTPT Sold-brandonhall10 built trans
    2009 Challenger SRT8
    http://www.grandprixforums.net/threa...uestion.....no
    Expert at being gay.
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  8. #8 Re: Fuel pressure drop 
    Killa Bee Scottydoggs's Avatar
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    do this.


    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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