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Thread: Fuel Pressure Regulator

  1. #1
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    Fuel Pressure Regulator - I love my VX again.

    Im pretty sure mine is failing, I am running too rich. Question is how easy is this to replace? And honestly I do not know of its exact location or what it looks like. Trust I am a quick learner.

    Any help?

    Also should I go ahead and buy from St. Charles or another distributor?
    Thanks.

    JRH
    Last edited by JHarris1385 : 06/05/2007 at 07:13 AM

  2. #2
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    "Engineers believe if it ain't broke, it doesn't have enough features yet"

  3. #3
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    Consider it read. But how easy was the install? On a 1-10 scale.

  4. #4
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    What make you think you are running too rich, and why do you think its the fuel pressure regulator?

    John C.

  5. #5
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    Quote Originally Posted by JHarris1385
    Im pretty sure mine is failing, I am running too rich. Question is how easy is this to replace? And honestly I do not know of its exact location or what it looks like. Trust I am a quick learner.

    Any help?

    Also should I go ahead and buy from St. Charles or another distributor?
    Thanks.
    Pretty easy if you have tool to remove internal ring grommet (??? see pic below ) something like that:


    Just in case you want go with aftermarket, do not buy Standart Motor/GP Sorensen unit, Neihoff/Borg Warner should be fine. They are available in Checkers at least.
    2001 Isuzu VehiCROSS (build in progress): 4JX1/A340/part time, 2" body lift, front Aisin hubs, rear Aussie Locker, 4.56 gears, OEM rear sway bar disconnect, AirFlow snorkel, cabin air filter
    1980 Jeep Cherokee (assembling): 1.5" body lift, TBI, HEI
    1987 AMC Eagle: stock

  6. #6
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    Thanks alot. My previous post(s) conclusions led to the FPR. I have a tool similar, for use on the John Deere. Thanks. SHould I order from St. Charles?

  7. #7
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    This is the FPR showing correct assembly, and part #. its at the drivers side rear of the injector fuel rail.

    John C.

  8. #8
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    Quote Originally Posted by JHarris1385
    Thanks alot. My previous post(s) conclusions led to the FPR. I have a tool similar, for use on the John Deere. Thanks. SHould I order from St. Charles?
    Just compare price from Checkers and Isuzu and select cheapiest source. I think it is exactly same part in different packages (Neihoff/Borg Warner/Isuzu).

  9. #9
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    Just curious...

    Has anyone ever tried an adjustable fuel pressure regulator?
    SilverBullet75
    Formerly: '01 Ebony VXSTLTH
    Now: '08 Saab 9-7x Aero 6.0L

  10. #10
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    Wink

    Quote Originally Posted by SilverBullet75
    Has anyone ever tried an adjustable fuel pressure regulator?
    Check the "similar threads" @ the bottom of this page & you'll find what you're looking for.

  11. #11
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    So I finally got my FPR in mail today from drivewerks.com. But I come home to find out that my retaining ring pilers tips are too large to fit through the holes.

    Question is are these pilers easily purchased at HD or Lowes in smaller tip sizes?

  12. #12
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    Quote Originally Posted by JHarris1385
    So I finally got my FPR in mail today from drivewerks.com. But I come home to find out that my retaining ring pilers tips are too large to fit through the holes.

    Question is are these pilers easily purchased at HD or Lowes in smaller tip sizes?
    In worst case you can use file on what you have But I think HD/Lowes/Sears should have them in right size.

  13. #13
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    Bought some new ones with multiple tips and angles. They are great. BUTTTTTT. Iv got the fuel rail almost completely off and can not get the bolts that attach the black cover over the fuel pressure regulator unbolted from the common chamber. Even PB blaster has not worked yet.

    Ill post pics later, if you all do not know what bolts I am talking about. They are completely round and require a large allen wrench. Talk about leverage with an allen wrench.

    Has anyone done this repair yet?

  14. #14
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    Quote Originally Posted by JHarris1385
    Bought some new ones with multiple tips and angles. They are great. BUTTTTTT. Iv got the fuel rail almost completely off and can not get the bolts that attach the black cover over the fuel pressure regulator unbolted from the common chamber. Even PB blaster has not worked yet.

    Ill post pics later, if you all do not know what bolts I am talking about. They are completely round and require a large allen wrench. Talk about leverage with an allen wrench.

    Has anyone done this repair yet?
    If I understand correctly, you talking about the bolts marked as 340 here:

    Mine bracket was holded with the internal hex on the side and regular metric bolt on the rear actually The side bolt was replaced with the regular bolt at the end, though - I also almost rounded it with not 100% fitted tools

  15. #15
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    Nice diagram, where did you pull that from?

    I gave up on it for now going to try tomorrow maybe the pb blaster will soak in more by that time.

    I almost busted the allen wrench trying to lossen it.

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