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Negative pressure in fuel tank

Discussion in 'Technical Chat' started by Conman117, Apr 3, 2013.

  1. Apr 3, 2013 at 2:08 PM
    #1
    Conman117

    Conman117 [OP] AWESOME MEMBER

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    So whenever I open my gas tank, there's a rush of air into the tank when I remove the cap. Like, a large amount of air. My first thought is something in my charcoal canister is plugged, not allowing air back into the tank.
    Thought or ideas as to why I would have negative pressure in my tank?
     
  2. Apr 3, 2013 at 3:11 PM
    #2
    Tacoma Mike

    Tacoma Mike 41 Year Toyota Master/ASE Master

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    Suppose to. Keeps fumes in untill the right time to be burned. No check engine light. Forget it and drive it. :)
     
  3. Apr 3, 2013 at 3:16 PM
    #3
    Krazie Sj

    Krazie Sj Resident Jackass

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  4. Apr 3, 2013 at 3:22 PM
    #4
    Conman117

    Conman117 [OP] AWESOME MEMBER

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    K cool. I'll live with it for now until I have time to rummage around in my engine bay
     
  5. Apr 3, 2013 at 3:34 PM
    #5
    Krazie Sj

    Krazie Sj Resident Jackass

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    Wha'? Live with it for now? It's supposed to be like that. Don't fuck with it unless you want a CEL to come on.
     
  6. Apr 3, 2013 at 3:53 PM
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    Tacoma Mike

    Tacoma Mike 41 Year Toyota Master/ASE Master

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  7. Apr 3, 2013 at 4:35 PM
    #7
    Conman117

    Conman117 [OP] AWESOME MEMBER

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    It's just disturbing when my cell takes a huge gulp of air and expands.
     
  8. Apr 3, 2013 at 6:12 PM
    #8
    bubba353z

    bubba353z Titles? We don't need no stinkin' titles.

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    He's got a 98 and running a fuel cell - I'm guessing CEL's may not be a concern.

    Probably need to add a rollover vent in the cell.
     
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