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Carbon canister leaking

Discussion in 'TBI & EFI Conversions' started by Steven Rodriguez, Jul 15, 2019.

  1. Steven Rodriguez

    Steven Rodriguez Member

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    Joined:
    Jun 26, 2019
    Location:
    San Angelo
    First Name:
    Steven
    Truck Year:
    1987
    Truck Model:
    sierra classic 1500
    Engine Size:
    5.7 350
    I have a 87 gmc sierra with a tbi conversuon It has a fuel port a middle port that i plugged because thats were it leaked from and a double over under port that seems to be a vacuum line is it ok to plug the middle port
     
  2. Rusty Nail

    Rusty Nail Whatever!

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    Truck Year:
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    Truck Model:
    C20, K5
    Engine Size:
    350, 350
    No?
     
  3. Steven Rodriguez

    Steven Rodriguez Member

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    Joined:
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    Location:
    San Angelo
    First Name:
    Steven
    Truck Year:
    1987
    Truck Model:
    sierra classic 1500
    Engine Size:
    5.7 350
    No
     
  4. Steven Rodriguez

    Steven Rodriguez Member

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    Joined:
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    Location:
    San Angelo
    First Name:
    Steven
    Truck Year:
    1987
    Truck Model:
    sierra classic 1500
    Engine Size:
    5.7 350
    Im sure the carbon canister is ruined but i want to solve the problem before replacing
     
    Last edited: Jul 16, 2019
  5. Steven Rodriguez

    Steven Rodriguez Member

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    Joined:
    Jun 26, 2019
    Location:
    San Angelo
    First Name:
    Steven
    Truck Year:
    1987
    Truck Model:
    sierra classic 1500
    Engine Size:
    5.7 350
    What could be causing the over flow bad line i just bought the truck and noticed on the gas tank I'm using has a gas cap that doesnt seal properly when i switched to the gas cap that does seal caused the tank to pressure up any advice could help i have a gas water heater and don't want to admit gas into the atmosphere
     
  6. Charlie

    Charlie Mopar by Birth. Chevy by Choice.

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    Truck Year:
    1974
    Truck Model:
    Cheyenne 10 LWB
    Engine Size:
    350/TH350/AC/4 BBL Quadrajet
    :welcome:
     
  7. bedwards

    bedwards Full Access Member

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    Truck Year:
    1985
    Truck Model:
    c10 Silverado
    Engine Size:
    305
    Your not supposed to get liquid gas in the canister, just vapors. Something is allowing gas from the tanks through the lines into the canister. On my truck, the selector valve hung and allowed gas from one tank to be pumped into the other until it was full and then into the vapor lines into the canister and all the way up to the carb vent and into the carb. Once you find that and fix it, you can get a new canister from RockAuto cheap and fix it right.
     
  8. Steven Rodriguez

    Steven Rodriguez Member

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    Joined:
    Jun 26, 2019
    Location:
    San Angelo
    First Name:
    Steven
    Truck Year:
    1987
    Truck Model:
    sierra classic 1500
    Engine Size:
    5.7 350
    THANKS BRYAN
     

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