Is my new fuel pump not working correctly? video inside.

Discussion in 'The BS Topic' started by QUAKE_WARS, Jun 10, 2021.

  1. QUAKE_WARS

    QUAKE_WARS Veteran Member

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    I'm posting in BS section since its not camaro related.

    Even when I rev this thing up into the 3000 RPM range you can see the filter does not even fill up.
    I would have thought at high RPM gas would gush out into the filter. The fuel pump has less than 200 miles on it.

    Does someone have a filter like this to see if this is normal. I dont want to get stranded LOL.

     
  2. berg2695

    berg2695 Veteran Member

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    That's sort of fascinating. I have no idea. The fuel level inside the filter media must be higher, one would think. It would be fun to have a little window in there to see. Maybe the filter material is working like those Holley Hydramats that go into gas tanks.
     
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  3. Chevyforever

    Chevyforever Veteran Member

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    It doesn't look right to me. I would expect to see significantly more gas than that in the filter, how does the truck drive, does it stumble under acceleration ? Would weak spring in pump contribute to this ?
     
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  4. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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    It will never fill all the way when it's sideways because there will always be air trapped inside of it.
    Remember... The carb only takes fuel in when the float allows it to come in.

    The fuel pump can't push fuel against pressure (between the pump and carb) when the carb isn't allowing fuel into it.

    It you disconnected the fuel line going to the carb, hold the filter upright (with the end of the hose in a non-sealed container) and cranked the engine, it should fill up very quickly and your pump will move much more fuel than when the carb is closed off from fuel input.
     
  5. Zspoiler

    Zspoiler Veteran Member

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    Check the fuel pump pushrod And put a fuel pressure gauge on it as well ,Should be at least 5lbs.
     
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  6. QUAKE_WARS

    QUAKE_WARS Veteran Member

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    makes sense Twisted.
     
  7. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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    Does your fuel pump have a return line back to the tank?
     
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  8. Jodi

    Jodi Veteran Member

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    The fuel hose between the pump and the filter is kinked, it might be enough to impede flow.
     
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  9. Happy_Dan

    Happy_Dan Veteran Member

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    This thread is useless without pictures of the truck.
    Twisted theory makes sense.

    It does seem like the fuel chamber in the carb is getting enough fuel because I don't see or hear anything that sounds like it's running out of fuel. I would look at my C-20 but the filter is metal so I can't see it. It is sideway too because of the way the fuel line comes up. I could not get a filter on vertical.
     
  10. TTR230

    TTR230 Veteran Member

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    It's this reason I stopped using translucent fuel lines and filters on bikes I worked on, people were always concerned that the lines weren't full, and it's even worse when it gravity fed.
     
    Last edited: Jun 11, 2021

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