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Vapor Lock On F134

Discussion in 'Early CJ5 and CJ6 Tech' started by Michael Wedin, Jun 11, 2020.

  1. Jun 11, 2020
    Michael Wedin

    Michael Wedin Member

    Sweetwater, TX
    Joined:
    Mar 20, 2020
    Messages:
    64
    As the days get warmer in west Texas My carburetor seems to be starved for gas and I believe it is having vapor lock problems. New gas lines, rebuild carb and fuel pump on a a rebuilt F-134. During the cooler months it has had no problems. Has anyone had similar problems and what did you do to alleviate this. I understand heat makes the gas turn to a vapor keeping the fuel pump from getting gas to the carb. Is there any good insulation wrap for the fuel lines, since they are close to the exhaust pipe and manifold.
     
  2. Jun 11, 2020
    PeteL

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

    Hills of NH
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  3. Jun 11, 2020
    Alan28

    Alan28 Well-Known Member 2022 Sponsor

    Châtillon en...
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    I have a Solex on my F 134 and I had some trouble long ago. Then I cleaned the carb (the pump inside was dirty, etc...) I changed the spark plugs and made some adjustments on the carb and the timing, nothing complex.
    It was 3 years ago and since this time, winter or summer, all is perfect, that was a good surprise.
    You will find good help on this forum.
     
  4. Jun 11, 2020
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    Jul 30, 2003
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    Can you post pictures of your engine compartment ?
    Maybe someone will see something you don't.
     
    OldAdobe likes this.
  5. Jun 11, 2020
    PeteL

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

    Hills of NH
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    Just thinking out loud... if it runs worse when warm, that seems likelier to be a rich condition than a lean one.

    Carb float or other adjustment? Might be worth looking at the plugs, check their color.

    When you say "starved for gas" what are the symptoms, and under what conditions? Idle, sudden acceleration, steady heavy load?
     
  6. Jun 11, 2020
    colojeepguy

    colojeepguy Colorado Springs

    At the foot of...
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    Any chance you're still running a tank of gas that you bought months ago? Gasoline is formulated differently for winter and summer...
     
  7. Jun 12, 2020
    Jrobz23

    Jrobz23 Member

    Northern, WI
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    Oct 3, 2016
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    I put a out board motor primer bulb in line. Made that initial fire issue go away on hot days.
     
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