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Board index » 1997-2008 Grand Prix Discussion » 3800 Engine L36/L26

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02gpgtguy
 Post subject: Fuel Pressure
PostPosted: Wed Sep 21, 2011 2:35 pm 
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What should a 02 GT have fuel pressure wise. In the books ive seen 48-55psi. My car has 48psi with key on and than when you start and run it. It.ll drop to 42psi.. Is that to low of fuel pressure. Fuel filter has been replaced. Im having problems with it having no power. You give it to much gas it will wind out and slam into gear till you hit 4th than it will come out but still have no power.

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02 Chevy Zr2-sl2,2"BL,Mtclassic II's,Flowmasters,duratrak lockers 3.73's gears
97 Dodge avenger-to many to list-Sold
02 Gp Gt- Intake,Gmpp,PCM,3In Dp.
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Malefic_GP
 Post subject: Re: Fuel Pressure
PostPosted: Wed Sep 21, 2011 2:47 pm 
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Probably a good idea just to replace the fuel filter anyways. If that wasn't it, replace the fuel pump too.

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02gpgtguy
 Post subject: Re: Fuel Pressure
PostPosted: Thu Sep 22, 2011 6:54 pm 
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So thats to low of fuel pressure for them than.. Ive already replaced the fuel filter.

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02 Chevy Zr2-sl2,2"BL,Mtclassic II's,Flowmasters,duratrak lockers 3.73's gears
97 Dodge avenger-to many to list-Sold
02 Gp Gt- Intake,Gmpp,PCM,3In Dp.
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Malefic_GP
 Post subject: Re: Fuel Pressure
PostPosted: Thu Sep 22, 2011 11:18 pm 
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Check out the gm service manual on how to replace the pump, it's pretty easy since there is a access panel inside the trunk.

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Blackarrow98gp
 Post subject: Re: Fuel Pressure
PostPosted: Thu Sep 22, 2011 11:30 pm 
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Here's a write up with pics: Fuel pump install '97-'03
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02gpgtguy
 Post subject: Re: Fuel Pressure
PostPosted: Fri Sep 23, 2011 7:35 am 
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I know how to replace the pump im asking is that pressure to low. I dont wanna go replacing things that dont need to be replaced.

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02 Chevy Zr2-sl2,2"BL,Mtclassic II's,Flowmasters,duratrak lockers 3.73's gears
97 Dodge avenger-to many to list-Sold
02 Gp Gt- Intake,Gmpp,PCM,3In Dp.
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Milestone
 Post subject: Re: Fuel Pressure
PostPosted: Fri Sep 23, 2011 7:42 am 
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Have you checked your fuel pressure regulator?? Make sure that there is no cracks in the vaccum line going to it. Sound like your FPR is on its way out.

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02gpgtguy
 Post subject: Re: Fuel Pressure
PostPosted: Fri Sep 23, 2011 7:59 am 
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Ya i have its good. Hold pressure like it should im wondering if its the pump..

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02 Chevy Zr2-sl2,2"BL,Mtclassic II's,Flowmasters,duratrak lockers 3.73's gears
97 Dodge avenger-to many to list-Sold
02 Gp Gt- Intake,Gmpp,PCM,3In Dp.
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Blackarrow98gp
 Post subject: Re: Fuel Pressure
PostPosted: Fri Sep 23, 2011 9:29 am 
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Look up Document ID 775122 Fuel System Diagnosis, if you haven't already. That will walk you through it step by step.
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