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If I dont have a charcoal cannister, do I need to substitute?

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    If I dont have a charcoal cannister, do I need to substitute?

    I dont have a charcoal canister. Do I need to plug the line or can I lead it to a DIY type filter or pick up an ebay filter and rebuild it?


    If I just plug the source of the line from the throttle body, can I make an assumption these fuel vapors will just burn off?

    #2
    You can cap the nipple at the TB.

    Do not cap the other line or leave the valve unplugged. Zip tie the line/valve to a low point on the car and expect some fuel vapors once in a while.

    Unless your filter is rusted to bits you could refill it, or just replace it with anther similar unit.

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      #3
      Originally posted by roguetoaster View Post
      You can cap the nipple at the TB.

      Do not cap the other line or leave the valve unplugged. Zip tie the line/valve to a low point on the car and expect some fuel vapors once in a while.

      Unless your filter is rusted to bits you could refill it, or just replace it with anther similar unit.
      Good input, and I would leave it open.

      Previous owner chucked the can and just left the line open. Its been fine thus far but it probably would be smart to complete the system. I noticed theres a connector for the PCV, it throw a code?

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        #4
        Originally posted by jaredmac11 View Post
        Good input, and I would leave it open.

        Previous owner chucked the can and just left the line open. Its been fine thus far but it probably would be smart to complete the system. I noticed theres a connector for the PCV, it throw a code?
        i had mine disconnected for 2 years and never had a check engine light on my m20. not sure about m42 if that's what you have though

        1989 Coupe build thread: http://www.r3vlimited.com/board/showthread.php?t=312012
        IG: @mitchlikesbikes

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          #5
          I don't recall if it will cause a CEL to disconnect the valve, but it's certainly more ecologically friendly to connect it to the TB.

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            #6
            I agree. I dont drive the car as a daily but it would be good to properly manage the fumes.

            OOC, is there a cheaper, non BMW charcoal canister I can find? I would really like to get one that isnt 20+ years old but its hard to find a generic one that suits the right purpose.

            Not sure if anyone has successfully used one not from the specific car.

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              #7
              Go to the wreckers and look around.

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                #8
                None of my E30s have them.
                Cap the port at the engine, if there is a solenoid take it off and throw it in a box.
                Take a small filter and put it on the line from the fuel tank.
                If I remember right there is some kind of yard appliance fuel filter that plugs right in to the line. I'll see if I can remember / find wat I used.
                I never have fuel vapors that I notice.

                The filters I have used on the fuel tank vapor outlet look like these.



                I'm a stickler about the only air going in to my engines is through the airbox inlet.
                Jimmy P.
                87 E30 M3 Prodrive British Touring Car
                88 E30 M3 Zinnoberot - Garage Queen
                88 E30 M3 Lachsilber - SCCA SPU #98
                92 M Technic Cabrio - S14 Powered!
                98 318Ti Morea Green
                04 Ford F350 Dually Tow Machine

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