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Carb trouble...blown power valve?

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    #16
    Well great news, I got the car to run long enough to look at the carb while its running and caught sight of my secondaries just dumping fuel into the carb. I changed out the secondary needle and seat with one I had laying around and it fired up and ran good.

    I also adjusted everything back to normal including the acc pump. I need more of a pump shot, I'm 99% convinced. I have no clue what size shooter I have in there now (used ebay special) so I'm not sure what to get nor do I know the stock size either.

    Also when the car was running like crap I mentioned it had alot more power on the top end, should I step up on the the primary jets? Is there anything I can do with the secondary metering plate to give it more fuel?

    I also checked the power valve by screwing the mixture screws all the way in and it didnt run. So thats good, and I think it might already have blow out protection cause its taken alot of good backfires.

    2009 Ford F-350 6.4 powerstroke diesel. 1977 Ford F-150 built 300 six, 5 speed trans. 1976 MG MGB roadster, 359w, t5 5 speed. 1996 Kawasaki ninja ZX6R.
    My rod is glowing, my bead is clean, my middle name is acetylene

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      #17
      You can purchase metering plates in different sizes. You can also drill them thy give the orfice sizes in a chart. If you have vaccum secondarys therre are spring kits change opening and closing rates. get one of the books on moding Holleys and read it.
      Scars are tatoos of the fearless

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        #18
        I got the secondary spring kit already. I'm gonna do some reading on modding a 4160. I got time during the day, 3 study halls in school and access to the internet.

        2009 Ford F-350 6.4 powerstroke diesel. 1977 Ford F-150 built 300 six, 5 speed trans. 1976 MG MGB roadster, 359w, t5 5 speed. 1996 Kawasaki ninja ZX6R.
        My rod is glowing, my bead is clean, my middle name is acetylene

        Comment

          #19
          When you get the right opening you wont fell them open no bogg or jerk.
          Scars are tatoos of the fearless

          Comment

            #20
            Never mind, Having the same problem. Goin to go get a rebuild kit now. BS..

            2009 Ford F-350 6.4 powerstroke diesel. 1977 Ford F-150 built 300 six, 5 speed trans. 1976 MG MGB roadster, 359w, t5 5 speed. 1996 Kawasaki ninja ZX6R.
            My rod is glowing, my bead is clean, my middle name is acetylene

            Comment

              #21
              Rebuilt the carb, every thing seems fine now. I think I had junk in the needle and seat again. I also bought a russle aluminum fuel filter so no more glass ones falling apart. The carb has 64 jets, so I might get some new ones soon once I find out what I need.

              2009 Ford F-350 6.4 powerstroke diesel. 1977 Ford F-150 built 300 six, 5 speed trans. 1976 MG MGB roadster, 359w, t5 5 speed. 1996 Kawasaki ninja ZX6R.
              My rod is glowing, my bead is clean, my middle name is acetylene

              Comment

                #22
                Get a book on modifying Holley carbs. Front jets have nothing to do with rears. Rears have # like 12, 18, 22 etc. They are screw on with butterfly screw heads.
                Scars are tatoos of the fearless

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