Slant Six Flooding

Fuel and Air Systems

  1. Jim Kueneman

    Jim Kueneman FABO Gold Member FABO Gold Member

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    Warmer today and took the Dart on the same trip were I had the flooding problem earlier this week. I had lowered the floats yesterday and thought I had it. Well I don't. How can it be possible to have percolation with Dutra Duals and custom pipes coated with Zybar heat coating and the aluminum Offenhauser dual one barrel intake? I am not running heat riser from the exhaust to the intake.. does it even seem possible.... it was about 65 today and after a long drive at 65 MPH it was flooding over at the stop lights and would barely stay running. Let it cool off and it ran perfectly again. It is wide open. Guess I need to take the heat gun with me next time and look at the bowl temps. Need to figure this out before the 110 degree days come.

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  2. RustyRatRod

    RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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    What carburetors are on it, Jim?
     
  3. Jim Kueneman

    Jim Kueneman FABO Gold Member FABO Gold Member

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    Daytona CHV
     
  4. barbee6043

    barbee6043 barbee 6043 FABO Gold Member

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    Maybe has nothing to do with the float, but run the gas line OVER the valve over and get it away fro exh. man. ?
    By the way. that is one sexy slant!!!!
     
  5. Jim Kueneman

    Jim Kueneman FABO Gold Member FABO Gold Member

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    Ordered an AN-6 fuel pressure gauge. I have my suspicions on that as the rebuild kit for the Carter has been known to have too much pressure and the instructions say you can reuse the original spring without really explaining why...
     
  6. RustyRatRod

    RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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    I have no idea what that is. Is it based off a Holley, Carter, Stromberg?
     
  7. RustyRatRod

    RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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    Jim, I put a Cool Carb Technologies insulator spacer on Vixen and it made a huge difference cranking hot. It used to spin a good little bit hot but now it busts right off. I don't know if it will help yours or not but it surely couldn't hurt. Scroll down to the "Ford 1 barrel spacer" and that's the one I used.

    Order Products
     
  8. Jim Kueneman

    Jim Kueneman FABO Gold Member FABO Gold Member

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    Flooding dual carb setup update. So I went for a long drive with a thermal gun. Made it to where it acted up yesterday with a warmer day. Fuel lines "cold", bowls about 135F should be no problem and there was not. Made it to the small town I made it to yesterday and fine. Decided to make a run to the "big town". Made it there and went through several stop signs no problem. Did a u-turn and slowed to turn into the Auto Body Supply store and blurble-stall gas smell... Jump out and gun the carbs, 145F and "cold" fuel lines. WTF. Chatted with the store owner for a while and made it all the way home before it started acting up again... made it in the garage and shut it down and temped it.. 130F carb bowl and "cold" fuel lines.... double WTF. pulled the air-cleaners and the rear carb it smoking in the bore... gas spitting in through a hole in the bore.... mmmm.. Not hot... fuel pressure.. started to crack an AN-6 fitting at the fuel filter and lots of pressure still after shut down a few minutes. Ok pressure problem, fuel pump.... put the air cleaners back on started to walk in the house and the light bulb came one... how can there be that much pressure after the pump this long after shut down? There can't. Turned the fuel cap and "psssssst" as the pressure escaped! Eureka! Now to figure out why since I have the breather pipe in the trunk stuffed into the filler neck and out through the rubber boot in the filler tube trunk seal...... Note, it acted up worse the other day right after I filled the tank to the top for the first time... I am now down to a half a tank.
     
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    • RustyRatRod

      RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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      Remove the vent tube and blow it out with an air gun. I bet it's stopped up.
       
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      • barbee6043

        barbee6043 barbee 6043 FABO Gold Member

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        Vent the gas cap too?
         
      • Jim Kueneman

        Jim Kueneman FABO Gold Member FABO Gold Member

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        With the vent pipe (a properly functioning vent pipe that is) that should not be required (and it was not vented from the factory)
         
      • barbee6043

        barbee6043 barbee 6043 FABO Gold Member

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        Dirt daubbers?? They can F*** up anything.
         
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        • Jim Kueneman

          Jim Kueneman FABO Gold Member FABO Gold Member

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          Vent pipe was plugged! Now routed out and breaths cleanly... Road trip time today!
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          Last edited: Dec 22, 2020
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          • Tooljunkie

            Tooljunkie King of cobble/master of the broken bolt FABO Gold Member

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            Sometimes it is the simple things that make us scratch our heads.
            Hope its solved! sweet looking engine!
             
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