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Jeep Won't Run

Discussion in 'Early CJ5 and CJ6 Tech' started by jeepstar, Jun 4, 2023.

  1. Glenn

    Glenn Kinda grumpy old man Staff Member

    But....I've only got single action pumps on both of my F-heads.??? :shrug:
     
  2. Glenn

    Glenn Kinda grumpy old man Staff Member

    I think you're looking at a part that doesn't move.
     
  3. Glenn

    Glenn Kinda grumpy old man Staff Member

    It might be best to just install it and hook your fuel line up and give it a try.
     
    dozerjim likes this.
  4. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    That makes two of us buddy :(

    Do you have any such a thing as a dial indicator?

    Seems to me that later F-heads came with a single acting pump after the move to electric wipers, that's what the '72 parts manual shows-

    upload_2023-6-12_14-23-54.png

    The arm should be equivalent between the various iterations.

    upload_2023-6-12_14-36-36.png

    I may be way off but I suspect the later single action fuel pumps looked a lot like the earlier single action fuel pumps on the inside.
     
  5. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    but its the exact style fuel pump that has been on there for years and years. I will hook up the fuel pump, extend the soft line from fuel pump "in" side with the barbed fitting and run it directly to a gas can, see if that works and gets fuel.

    i have electric wipers.
     
  6. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    i plan on it, after work today. this is really bumming me out to the point of hauling it to the shop and letting them figure it out.
     
  7. 59cj5

    59cj5 Member

    As stated the dual action were only for vacuum wipers if you have electric wipers the single action should work. I have a single action with a spacer and it works fine. Although it would probably work without the spacer.
     
  8. vtxtasy

    vtxtasy oldbee 2024 Sponsor 2023 Sponsor

    Some resistance should be felt when installing the pump. If I remember correctly, some pumps could be installed with the arm above
    or below the cam. The arm has to be oriented correctly when installing or it will not work. You should be able to feel
    the arm on the cam and in this case, the top of the pump should push back against the force of installing.
     
    Ol Fogie and dnb71R2 like this.
  9. PeteL

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

    This.
     
    Ol Fogie likes this.
  10. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    I'm at my wits end. I can manually pump it to get gas to the carb.
     
  11. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    What's the hangy thing?

    Resized_20230612_185533.jpeg
     
  12. PeteL

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

    Tappet. (Valve lifter)
     
  13. SIDSCJ

    SIDSCJ Jeep addict

    Pull the coil wire and get someone to crank it over while you look in the hole.
    Is the lobe turning when the motor spins over? put a popsicle stick against the lobe and see if you can feel/ see the lobe go round and that it's pushing your stick like it would actuate the pump lever.
    What's that mark I see on the pic you just posted of the pump lobe?
    You need to make sure the lever is on top of the lobe before you try to bolt it down.
    Kind of a PITA to fight the pressure of the pump, keep the gasket aligned and start a bolt in.
    If it's easy, you're doing it wrong:D
     
  14. jeep peep69

    jeep peep69 Member

    I just went through this same thing as I’ve said before it’s the wrong pump the actuator arm is different shaped and don’t work I ended up buying the o mix Ada one and it worked the so called premium carter pumps are not made correctly when I go outside I’ll get the part number and post it.
     
    jeepstar likes this.
  15. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

  16. Glenn

    Glenn Kinda grumpy old man Staff Member

    I don't remember there always being noticeable resistance when installing a fuel pump. The position of the cam lobe is going to make a huge difference.
     
    Ol Fogie and vtxtasy like this.
  17. Glenn

    Glenn Kinda grumpy old man Staff Member

    Did you install the newest fuel pump today/this evening and it still not pump?
     
    jeepstar likes this.
  18. Oldpappy

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

    I am not sure what you posted has to do with this.

    The pumps you have tried are evidently not correct. You have determined these pumps work when manually articulated, but after numerous tries, with at least two different pumps, you are not getting it to work.
     
    Cj5dale likes this.
  19. Cj5dale

    Cj5dale Member 2023 Sponsor 2022 Sponsor

    Can you put some sort of paint/chalk on the pump arm, install it and turn it a few cranks and see if the cam is making contact with the arm.

    Just seems like the arm on the pump isn’t being worked by the cam
     
  20. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor