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Thread: Carburetor Troubleshooting

  1. #1



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    Carburetor Troubleshooting

    This is a basic troubleshooter sheet for a Carburetor.
    carb_troubleshoot.jpg
    (click image to expand)

  2. #2

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    Nice thanks ,
    Question for ya , My fuel pressure on the regulator jumps from 3 and 5 Back and forth while running is that normal? I stuck with using a mechanical fuel pump and holly fuel pressure regulator.

  3. #3




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    is that input or output pressure? Input can vary on motor speed, output should not vary unless the pump output is weak and can't keep up with demand.
    Pennyman1
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    Living the D-50 lifestyle since 1980

  4. #4

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    Yes that would be input pressure . Thanks pennyman just checking to see if that is right.

  5. #5



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    Hey Max why have regulator on a stock pump? Usually those are pretty much setup to run as is. Are you regulating a Weber with the mechanical pump?
    I also was going to say your pump is pulsating the gauge but as fast as it pumps, the gauge shouldn't fluctuate like that. Your gauge is prior the pump if I read your input pressure answer correctly. If regulating a Weber, I would think that the regulator and gauge would be after the mechanical pump or just before the carb so it will give a better reading on how much it is feeding the carb. I'm not sure if this will stress the pump diaphram either, by causing it to build up pressure behind a regulator.

  6. #6




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    it will stress the pump diaphragm and blow the pump sooner or later. It depends on how old the pump is.
    Pennyman1
    The best Dodge that Dodge never made
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