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134 Fhead Surge While At Idle

Discussion in 'Early CJ5 and CJ6 Tech' started by jeepstar, Aug 8, 2016.

  1. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    I posted both sides of the engine
     
  2. scoutpilot

    scoutpilot Member

    I’m sorry gents. There is NO PCV valve on this motor. The draft tube was engineered out during WWll. On the pax side is no more than a free flow from the valve cover to the intake manifold. The hose appears to be preformed for the application. The brass elbow is nothing more than just that. A brass elbow. See the link. PCV For the F-134 | Old Jeep Carbs LLC
     
  3. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Thank you scoutpilot for the clarification.
     
  4. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    I'm not sure I'm 100% agreed with that- that's kinda a funny looking fitting just to be a hose barb. I will agree that either way there's some thing not stock about the whole setup.

    The point is pretty much moot though- it's easy enough to trace the issue as being related to the the pvc/non-pvc dooey simply by unhooking the hose & capping off that fitting to see if there's a difference in how the engine runs.

    H.
     
  5. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    "Pvc" hose, for lack of proper nomenclature, was disconected from the top thing on the motor. Still surges. This is not the issue. Motor still sputters at idle

    20160811_153944.jpg
     
    Last edited: Aug 11, 2016
  6. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    You'll need to block that hose to prevent the possible vacuum leak, just tape over the end, clamp it shut with vicegrips or stick a conveniently sized bolt in it.

    H.
     
  7. Glenn

    Glenn Kinda grumpy old man Staff Member

    Please squeeze the hose and then run it.
     
  8. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

  9. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Pulled out the part on the T. Its all gummed up. Cleaned thouroghly with brake parts cleaner. Should there be a spring in there?
     
  10. Glenn

    Glenn Kinda grumpy old man Staff Member

    I give, what is that sticking out?
     
  11. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Spring & a ball bearing. it should rattle a bit if you shake it.

    H.
     
  12. Glenn

    Glenn Kinda grumpy old man Staff Member

    No spring. Should just rattle around if you shake it...it basically meters the flow.
     
  13. Glenn

    Glenn Kinda grumpy old man Staff Member

    At least I think there is no spring. :D That thing doesn't look complete anyway.
     
  14. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Odd, I could have sworn mine has a spring in there :worry:
     
  15. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Carb was loose. FML. thanks for the help, and suggestions. Vacuum gauge on pcv valve is at almost 15. 20160811_162318.jpg
     
  16. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Ill order a new pcv valve just in case
     
  17. Glenn

    Glenn Kinda grumpy old man Staff Member

    I could be wrong, I always assumed not by the way the ball rattles.
     
  18. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Why would the carb come loose? Engine vibration?
     
  19. Glenn

    Glenn Kinda grumpy old man Staff Member

    So you were just testing us were ya! :)
     
  20. Glenn

    Glenn Kinda grumpy old man Staff Member

    Not tightened properly to start with?