Fuel venting issues

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  • BingM3
    E30 Modder
    • Feb 2004
    • 863

    #1

    Fuel venting issues

    Hey guys have s50 in my e30m3, seems like my fuel is not venting as it used to.
    I hear a noticeable pressure release when I remove my gas cap (just got a new one).
    I also see the outer filler neck with some fuel.

    Never had this problem before. I've heard of the car having a fuel relief valve but have no clue where it is located or if someone can show me a picture where to find it. Would it be an e36 m3 valve or from an s14?

    Car has no more charcoal canister. Could it also be a purged return line?
    Fuel regulator pressure was checked and ok.
    Thanks for your inputs!
  • DesertBMW
    E30 Enthusiast
    • Aug 2011
    • 1018

    #2
    So you plugged the charcoal canister line then?

    Comment

    • tytypetersen
      Grease Monkey
      • Mar 2012
      • 347

      #3
      Where does the tank breather fuel line go? I have my vent hose just hanging out venting into the atmosphere and it works fine.

      Comment

      • BingM3
        E30 Modder
        • Feb 2004
        • 863

        #4
        Originally posted by DesertBMW
        So you plugged the charcoal canister line then?
        When these swaps are done, the canister is eliminated and supposed to be venting elsewhere

        Comment

        • justin_l_
          E30 Enthusiast
          • Jun 2007
          • 1079

          #5
          The canister doesn't have to be eliminated. People choose to eliminate it.

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