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Thread: How To: Install In-Tank Fuel Pump

  1. #46
    I am the Stig TurfBurn's Avatar

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    Also, you can leave the backseat parts off, and once the car is started check to make sure you feel the pump vibrating and that everything looks good to the eyes.

    Are your AFR's richer or leaner than what you had before?
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  2. #47
    Emanage and Liquid to Air orangezoom's Avatar
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    I can hear mine pump when I get out of my car when it is at idle , almost sounds like a quiet vacum cleaner




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  3. #48
    duMb TeaM


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    yah...mine sounds the same as that...but the only thing was that when i initially turned the key on (the first time) it never pumped. i can hear the car humming when its at idle, but the afr is totally fucked up. i cant even drive the car because its so lean, so i dont know what the fuck is going on. i tried to start the car today and nothing. it sounds like itll kick over then it just keeps turning and no start. i dont know whats going on but i think it might be the fuel pump.

    how much does the fuel pump depend on the voltage? i mean, its not good if its gonna run different when the voltage changes...that would mean you cant run a/c, lights, sounds...nothing
    duMb Ke0La

  4. #49
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    Quote Originally Posted by duMb KeoLa
    yah...mine sounds the same as that...but the only thing was that when i initially turned the key on (the first time) it never pumped. i can hear the car humming when its at idle, but the afr is totally fucked up. i cant even drive the car because its so lean, so i dont know what the fuck is going on. i tried to start the car today and nothing. it sounds like itll kick over then it just keeps turning and no start. i dont know whats going on but i think it might be the fuel pump.

    how much does the fuel pump depend on the voltage? i mean, its not good if its gonna run different when the voltage changes...that would mean you cant run a/c, lights, sounds...nothing
    I'd assume that since your problems started when the pump went in.... I'd check to see if it is picking up fuel ok.. check to make sure you have pressure and so foth... don't know if you have a fuel pressure gauge or not.

    Mine seems to fluctuate with voltage, I don't know if the walbro behaves better or not... I'm thinking about getting one because my pump system has done a few weird things of late.

    I'm thinking of using a high amperage voltage regulator to make sure that the voltage doesn't fluctuate everywhere and is locked in very tight.
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  5. #50
    I am the Stig TurfBurn's Avatar

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    Keola... any word?
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  6. #51
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    well installed mine last night.... car is running... but it was quite a bit lean... I richened the maps by about 16% to compensate for out of boost operation, but boosting it is still lean. I had to pull the pump in and out twice... so I'm wondering how much I messed that seal up. I'm only seeing about 30 psi of fuel pressure, I forgot to check the pressure before I did this whole operation, so I don't know what I had before but I believe it was supposed to be about 40. So I'm going to pull things again, pull that seal out and see if it is ok. If it isn't I'm going to use some high quality urethane adhesive to fix it if the dealer doesn't have one of those parts around. Hopefully that will solve the issue, otherwise if everything looks fine I'll be retuning the car at 30 psi fuel pressure...
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  7. #52
    New Car, HeHe... 1FASTMSP's Avatar

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    i am just curious if you ever resolved this issue, and what the outcome was...
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  8. #53
    I am the Stig TurfBurn's Avatar

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    never figured mine out... I tuned it to be about right... and not long after my engine blew on the race track (unrelated to the fuel pressure...was rich at the time)... so dunno! But never figured it out.. I'll play with it when I do my new engine in the spring.
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  9. #54
    Registered Member tekkie's Avatar
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    I dont know if this was mentioned in this thread or not but this makes it even a little easier.

    My walbro had 4 plastic tabs on it at the bottom, I just heated up a razor blade and cut them off, then I cut into the plastic piece as shown in the attached file. This way you do not have to cut the edges of the plastic piece that holds the pump in place, no wire ties, less chance of it falling off. The rubber support that was there had to be removed though, but its holding perfectly this way. Now you can go back to stock if you want
    Attached Images Attached Images

    In process!!!
    A totally different car than I had before


  10. #55
    Banned Brian MP5T's Avatar
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    Sweet Job on the How-To!

  11. #56
    #590 livelyjay's Avatar

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    This how-to is a bit old, but just wanted to add a little tip before doing a fuel pump swap. These things make it a little easier:

    Less than 1/4 of a tank of gas before removing the pump
    Unplug the power lines to the pump, then crank the engine to get the fuel out of the system. It may start, but it will die very quickly.

    This will help decrease spillage of fuel inside the car.

  12. #57
    duMb TeaM


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    what fuel pumps can actually be used for this? i got one from mam and its the gss340 and it doesnt look anything like the right one... anyone know the deal?
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  13. #58
    MAY THE SCHAWARTZ B WIT U ebmp5's Avatar
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    damn

    anyone got a thread like this for the p5! :rolleyes:
    RIP 02 p5. some one hit and ran it.

  14. #59
    New Car, HeHe... 1FASTMSP's Avatar

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    Quote Originally Posted by 1FASTMSP
    right, this is the one to use, the GSS 342, the other one is backwards from what we need, it won't allow the screen to sit the way it needs to in the tank.
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  15. #60
    I am the Stig TurfBurn's Avatar

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    Quote Originally Posted by ebmp5
    anyone got a thread like this for the p5! :rolleyes:
    Uh.. P5, MSP, MP3, 2.0L anything else... all the same.
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