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Four Cylinder Repacement Fuel Pump Issues

Discussion in 'Early CJ5 and CJ6 Tech' started by Howard Eisenhauer, Apr 28, 2024.

  1. Apr 28, 2024
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    8,163
    If you're wondering why your nice shiny new fuel pump isn't working watch this-

     
    Glenn and vtxtasy like this.
  2. Apr 29, 2024
    59cj5

    59cj5 Member

    Central WI
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    Sep 23, 2002
    Messages:
    43
    Good video thanks for posting
     
  3. Apr 29, 2024
    vtxtasy

    vtxtasy oldbee 2024 Sponsor 2023 Sponsor

    Tucson, AZ
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    "Everything I thought was going to be an easy fix turns out to not be an easy fix." I wonder what brand those tires are.
     
  4. Apr 29, 2024
    Oldpappy

    Oldpappy A.C. Fults - Curmudgeon at large 2022 Sponsor

    East Tennessee
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    I had tires like that on an M38 I owned 35 years ago. I think Coker has them under the Firestone branding.
     
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  5. Apr 29, 2024
    Oldpappy

    Oldpappy A.C. Fults - Curmudgeon at large 2022 Sponsor

    East Tennessee
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    Feb 8, 2021
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    Problem with his test set up is these pumps are really designed to have fuel gravity fed into the inlet before it can really "suck" any fuel. So, with his set up there was only air in the inlet line. He resolved that by priming the inlet hose.

    I use a small 3 gal boat tank for supply for this because it has a priming bulb, and just run the output line to another container.
     
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  6. Apr 29, 2024
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Like most, this video would have been much more watchable if edited to one-quarter of the time.
     
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  7. May 19, 2024
    Bobcreag

    Bobcreag Bob C

    Danville, CA
    Joined:
    Nov 5, 2014
    Messages:
    59
    Just had the same problem with a Napa pump. Took it back, got another one and it had the same problem. Too much free play in the pump lever before it moves the pump diaphragm.
     
    Glenn likes this.
  8. May 23, 2024
    Keys5a

    Keys5a Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
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    4,243
    This video is a classic example of way you don’t toss those old worn out parts in the trash bin. They are made better than the new crap parts that are supplied today. The old parts actually work as intended.
    -Donny
     
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