Leaky Fuel Filter

Fuel and Air Systems

  1. Crusty Brian

    Crusty Brian Active Member

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    So my 67 dart gt fuel filter is spraying fuel out. It's a 273 with a 500cfm edelbrock carb (brand new, maybe 200 miles on it) I'm on my 3rd fuel filter in 1 day. I've removed the Top of the carb to see if it was plugged up, nothing. The tank, sending unit and lines are new, wich was evident by the way I found nothing in the carb. Variables 1. I recently replaced the distributor with an O'REILLYS one, while I rebuild the original. 2. I recently found ethanol free gas and topped her off (about 3/4 of a tank). Stupid question time, would that mixture be an issue? And could the mechanical fuel pump be the problem? Also it's leaking from the line side not the carb side of the Filter

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  2. Scody21

    Scody21 Just send it

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    1. Changing the distributor won’t have any effect on fuel system delivery, unless you messed with the hoses.

    2. Super Clear aka Non ethanol will not hurt a thing and could be better for old motors. Also does not attract water like the corn fuel does...

    2. Where is the fuel spraying out from? A hose end, a pinch weld on the filter? Cracked hose?

    3. You running a fuel pressure regulator? Fuel pressure too high?
     
  3. Murray

    Murray FABO Gold Member FABO Gold Member

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    Where on the filter is it leaking? Is your problem in the can or in your clamps? Pictures?
     
  4. RustyRatRod

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

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    Have you checked the fuel pressure?
     
  5. Darter6

    Darter6 Well-Known Member

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    Check for cracks in the fuel line from pump to the filter.
    It's possible.
     
  6. 69FBCuda

    69FBCuda I'm so confused! FABO Gold Member

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    Are you saying that you cant clamp the hose tight enough? If yes your rubber is too big.:rofl:
     
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    • Lord Sparky

      Lord Sparky Well-Known Member

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      New rubber hose?
       
    • Hemioutlaw

      Hemioutlaw Make America Great Again! FABO Gold Member

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      I continually marvel (SMH) at some of the advice people in here ask for without really supplying much useful info to go on leaving us to all guess what the cause of the problem is.

      If you've got a fuel leak in the vicinity of the New x 3 filter you just installed then you need to pinpoint if the fuel is actually leaking there or possibly running down a hose to there from somewhere else. I would think that with the vehicle running, using a flashlight would make it real easy to determine the source be it a Hose, Filter, Carb, Regulator or Connection.(Disclaimer: Stay away from the Belts and Fan and Don't cut off your Head or Lose your fingers).

      I kinda like a start with 69FBCuda's idea as I recently put on a replacement fuel filter on a rubber fuel line/hose clamp setup and didn't catch that I'd bought one with 5/16" hose nipples vs the 3/8" nipples I previously had which led to a leak...Was a simple catch and fix though!
       
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      • Darter6

        Darter6 Well-Known Member

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        That's the fun of this.Who is the best guesser !
        All kidding aside. I have also seen steel lines leak after cutting the rubber hose with a razor knife.
        Leaves a scratch deep enough for pressurized fuel to leak past.
         
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        • Scody21

          Scody21 Just send it

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          All the time, it never fails. Clearly we can see the problem in the poor res photo some 2 thousand miles away in the magic ball that RRR likes throwing around...
           
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          • Dana67Dart

            Dana67Dart Like a fine wine, only getting better with age! FABO Gold Member

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            From my experience and the look of your photos the spring clamps are the first thing I would change. Cheap and easy.

            As others have said your supply pipe from the fuel pump might have pinholes or a split. It is also simple and cheap.

            Lastly, fuel line designed for fuel Injection, feels stiffer to me and the spring clamps might not be strong enough to apply enough clamping pressure.

            Also be sure you have the correct size hose
             
          • Crusty Brian

            Crusty Brian Active Member

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            It's leaking at the line
             
          • toolmanmike

            toolmanmike FABO MODERATOR Staff Member FABO Gold Member

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            Leaking on the pump side at the filter and not the carb side? Get rid of those short hoses. Buy some standard fuel line hose that is the same ID as the line is OD and the filter as well. Clamp it with the proper size Ideal/Triton worm style hose lamp. No Substitutes! Push the hose on a inch or two and clamp it twice if needed.
             
          • Crusty Brian

            Crusty Brian Active Member

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            Thanks everyone, I replaced the fuel pump and the problem is solved!
             
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            • Crusty Brian

              Crusty Brian Active Member

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              Thanks everyone,
              No sir, I was asking if it could be the fuel mixture or the fuel pump
               
            • toolmanmike

              toolmanmike FABO MODERATOR Staff Member FABO Gold Member

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              Was the pump squirting gas straight up out of the pump and you thought it was the filter that was leaking?
               
            • Hemioutlaw

              Hemioutlaw Make America Great Again! FABO Gold Member

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              Make sure that the filter nipple size matches the line ID, if it's Not a Snug Fit then one or the other is the wrong size.

              Also not mentioned is that the FUEL FILTER FLOW is ONE WAY ONLY so make sure the Filter Flow Direction is Correct. All Filters like your using have an Arrow with Flow on them and the Arrow should be pointed towards your Carburetor.
               
            • Crusty Brian

              Crusty Brian Active Member

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              Like it was pushing too much fuel and backing up at the filter. I've never experienced this from a bad pump.
               
            • Crusty Brian

              Crusty Brian Active Member

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              Thanks for the reply, all 3 had the "in" stamped on the case. It ended up being the pump
               
            • toolmanmike

              toolmanmike FABO MODERATOR Staff Member FABO Gold Member

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              Excessive fuel pressure could cause a leak if you have a wrong size hose or a bad clamp or loose clamp. With a sealed system, the excessive pressure will pass through the filter and the float and needle and seat can't control the pressure. The float bowl will overfill and drain out of the bowl vents and make the engine run real rich. I have seen that happen a dozen times but never saw excessive pressure cause a leak.
               
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              • toolmanmike

                toolmanmike FABO MODERATOR Staff Member FABO Gold Member

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                As long as it's fixed.
                 
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