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Cj5 1974.v8 304.starting Issue

Discussion in 'Intermediate CJ-5/6/7/8' started by houleyh, Oct 12, 2022.

  1. Oct 12, 2022
    houleyh

    houleyh New Member

    Quebec
    Joined:
    Jun 30, 2020
    Messages:
    42
    Hi, When my Jeep has been sitting for a few days. I do have to crank alot to get it started. It needs fuel because if I put a few drops of fuel into the carb, it fires right away.
    I have put a check valve before the fuel filter(carb, fuel filter then check valve then fuel pump).. This did not improve anything.. Could it be to little fuel in the carbs bowl, a weak fuel pump or something else?

    Thanks
     
  2. Oct 12, 2022
    bluesmokemonster

    bluesmokemonster blue-smokemonster or bluesmoke-monster?

    Gold Beach, OR
    Joined:
    Aug 12, 2010
    Messages:
    86
    Definitely sounds like the carb is empty. But why only after a few days? An electric fuel pump will solve the problem but why is the carb emptying so quickly?
     
  3. Oct 13, 2022
    Joe Dokes

    Joe Dokes New Member

    Joined:
    Mar 15, 2016
    Messages:
    36
    Before you try to start it pull the air cleaner and pump the throttle three or four times to verify no fuel.

    If no fuel, check your float level and make sure your float bowl is full of fuel.

    If the float is at the appropriate level, check the output of your fuel pump. It could be not filling the bowl all the way.
     
  4. Oct 13, 2022
    FlatlanderCJ5

    FlatlanderCJ5 Member

    Wichita, KS
    Joined:
    Jan 2, 2022
    Messages:
    151
    This may sound like a weird solution but I saw a guy on youtube with a CJ5 that had a somewhat similar problem. His fix (temporary) was to pressurize the fuel tank before starting, literally he put his mouth over the gas cap hole and blew into it. If I remember right, he said it was because of old/cracked rubber fuel lines back around the gas tank. Apparently those small cracks would allow the gas to creep it's way back into the tank instead of staying up in the fuel line. You might do some snooping on the internet for similar problems, it seems I read that somewhere also besides his video. Good luck.
     
  5. Oct 14, 2022
    bigjohn

    bigjohn Active Member

    Kelso Wa
    Joined:
    Mar 18, 2010
    Messages:
    1,054
    What engine/carb are we talking about? I’ll throw out a guess though. If you’re running the 2100 on a 304 there’s a fair likelihood the power valve is leaking the fuel into the engine. Easy check is to remove the carb and abs pull the power valve cover. If it’s wet with fuel at all in there without removing the power valve the gasket is bad.
     
    Joe Dokes likes this.
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