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Dauntless Flooded

Discussion in 'Early CJ-5 and CJ-6 Tech' started by rejeep, Feb 2, 2019.

  1. Feb 2, 2019
    rejeep

    rejeep Active Member Sponsor 2019 Sponsor

    Rochester, NY
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    went to go start the Rover (Buick 225) this afternoon and after several cranks I got ignition, but then it stalled out and the carb was overflowing with gas...

    The engine was all but trouble free till today... bad case of flooding? How long until I should be able to start it?

    Side question but related... would a non vented gas tank add to the problem? I replaced the seal on the gas cap and now I’m certain I have a fairly closed system..
     
  2. Feb 2, 2019
    colojeepguy

    colojeepguy Colorado Springs Sponsor

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    Most likely some debris in the needle & seat of the carb.
     
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  3. Feb 2, 2019
    Twin2

    Twin2 wasn't me Sponsor 2019 Sponsor

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    if it had the lake affect on bottom of intake . I would remove spark plugs and crank it over
     
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  4. Feb 2, 2019
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

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    x2
     
  5. Feb 2, 2019
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
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    Sop up all the gas, bang vigorously on the side of the carburetor with a screwdriver handle or such, and try it again. You have a float that is stuck open. Helpful if someone else operates the ignition switch while you watch the engine. Gas flowing out of the carburetor is a stuck float.

    Gas tank vent is not related. You need a vent of some kind to relieve vacuum above the fuel, whether that be a vented cap or something else. The cap seal does not affect the vent through the cap. There is a labyrinth for vapors in the cap that does not involve the seal.
     
  6. Feb 2, 2019
    rejeep

    rejeep Active Member Sponsor 2019 Sponsor

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    It’s a non vented cap.....

    But on the carb... fresh rebuild with motor, float still likely to stick?

    Going to try suggested remedies
     
  7. Feb 2, 2019
    timgr

    timgr Jeepin' Nerd Sponsor

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    You need a vent of some sort. If you do not have a vented cap, you would typically have a vapor recovery system that vents the tank remotely. You cannot operate without a tank vent.
     
  8. Feb 2, 2019
    rejeep

    rejeep Active Member Sponsor 2019 Sponsor

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    Well a couple taps and it blew a bunch of unburnt fuel out the tailpipe.
    Let or run till it warmed up.. didn’t want to idle on its own... will have to investigate that tomorrow...
     
  9. Feb 2, 2019
    Keys5a

    Keys5a Sponsor Sponsor

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    A fresh engine is easily possible to get a stuck needle. Swarf or dirt, or even a piece of rubber shaved off when assembling a hose over a sharp edge. Any of these things and more can get lodged between the needle and seat, causing the carb to overflow gas. I've seen this a couple times on first time start-ups.
    -Donny
     
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  10. Feb 3, 2019
    wasillashack

    wasillashack Member

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    All of the above, good luck!
     
  11. Feb 3, 2019
    70cj5134f

    70cj5134f Member

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    Fuel filter in line?
     
  12. Feb 3, 2019
    rejeep

    rejeep Active Member Sponsor 2019 Sponsor

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    Couple taps on side of the bowl and we had liftoff... had bunch of raw fuel out the tailpipe as well.

    Drive around town today cleared everything out.. slight idle adjustment and were good to go.

    Just need to perm address the fuel cap issue now.
     
  13. Feb 3, 2019
    Beach66Bum

    Beach66Bum ‘66 Tux Sponsor

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    Bought this gas cap off eBay a few years ago. Have had no issues with it. Ad said vented gas cap for 55-71 cj5 Jeep.
     
  14. Mar 18, 2019
    rejeep

    rejeep Active Member Sponsor 2019 Sponsor

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    Take 2...



    So this reared it’s ugly head again today. Ironically I stuck with a carb to avoid the fuel issues with injection...

    Truck shut down while driving. Needed to tap the carb bowl and floored the accelerated.. got truck to start, but no idle and stumble with WOT...

    Not being a carb genius what am I looking at here?
     
  15. Mar 18, 2019
    dparker650

    dparker650 New Member

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    Still a piece of dirt. It’s just moving around in there. Take the air cleaner off, start the vehicle and while revving it to keep it running seal off the air inlet with your hand until it almost stalls. Then remove your hand (give it air) and revv to clear it out. You don’t have to rev high but this will flood the carb and help move the dirt out. You may have to do this several times. However, if it doesn’t do the trick you’ll have to tear down and clean the carb. This is my dads trick for working on carbs. Works a lot of the time for me anyways.
     
  16. Mar 18, 2019
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

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    I think ITLKSEZ and tomasinator did the 't-shirt trick' - similar to the above (sure someone could find the link). Could the power valve/piston be sticking open and flooding?
     
  17. Mar 19, 2019
    70cj5134f

    70cj5134f Member

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    Time to pull the lid off the carb and clean it out!
     
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  18. Mar 19, 2019
    colojeepguy

    colojeepguy Colorado Springs Sponsor

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    That would make it run very rich but it shouldn't cause flooding.
     
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  19. Mar 19, 2019
    47v6

    47v6 junk wrecker! Sponsor

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    Debris between needle and seat?, Float level incorrect?, Float has a hole in it?, Float catching on something,? Fuel pressure incorrect? Take it apart. Find out what's wrong.
     
  20. Mar 19, 2019
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

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    Guess I was thinking more along the lines that fuel was coming out of the exhaust, it wouldn't idle well, and stumbling upon wide open throttle - in other words and extreme fuel rich condition (so maybe I have an incorrect usage of the term flooding - I guess I think of it as flooding the combustion chamber and getting the plugs so wet with fuel they won't spark)....But you are correct that it would not cause overflow or flooding of the carb itself as the OP describes in the first post. :oops:
     
    Last edited: Mar 19, 2019

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