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134 Fhead Surge While At Idle

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

  1. Aug 11, 2016
    jeepstar

    jeepstar Sponsor Sponsor

    Sheboygan
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    I posted both sides of the engine
     
  2. Aug 11, 2016
    scoutpilot

    scoutpilot Member Sponsor 2019 Sponsor

    Asheboro, NC
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    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. Aug 11, 2016
    jeepstar

    jeepstar Sponsor Sponsor

    Sheboygan
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    Thank you scoutpilot for the clarification.
     
  4. Aug 11, 2016
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
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    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. Aug 11, 2016
    jeepstar

    jeepstar Sponsor Sponsor

    Sheboygan
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    "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. Aug 11, 2016
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

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    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. Aug 11, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    Please squeeze the hose and then run it.
     
  8. Aug 11, 2016
    jeepstar

    jeepstar Sponsor Sponsor

    Sheboygan
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  9. Aug 11, 2016
    jeepstar

    jeepstar Sponsor Sponsor

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    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. Aug 11, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

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    I give, what is that sticking out?
     
  11. Aug 11, 2016
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

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

    H.
     
  12. Aug 11, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

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    No spring. Should just rattle around if you shake it...it basically meters the flow.
     
  13. Aug 11, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

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    At least I think there is no spring. :D That thing doesn't look complete anyway.
     
  14. Aug 11, 2016
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

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    Odd, I could have sworn mine has a spring in there :worry:
     
  15. Aug 11, 2016
    jeepstar

    jeepstar Sponsor Sponsor

    Sheboygan
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    Carb was loose. FML. thanks for the help, and suggestions. Vacuum gauge on pcv valve is at almost 15. 20160811_162318.jpg
     
  16. Aug 11, 2016
    jeepstar

    jeepstar Sponsor Sponsor

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    Ill order a new pcv valve just in case
     
  17. Aug 11, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

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    I could be wrong, I always assumed not by the way the ball rattles.
     
  18. Aug 11, 2016
    jeepstar

    jeepstar Sponsor Sponsor

    Sheboygan
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    Why would the carb come loose? Engine vibration?
     
  19. Aug 11, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

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    So you were just testing us were ya! :)
     
  20. Aug 11, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

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    Not tightened properly to start with?
     

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