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  1. #1
    Veteran Member Four Rings Seerlah's Avatar
    Join Date
    Dec 05 2007
    AZ Member #
    23104
    Location
    A place between here and there

    DIY: Charcoal canister replacement

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    If you go pump your car with gasoline and end up with the scenerio of having the pump constantly cut off, having to adjust the nozzle and apply certain pressure so the pump does not cut off yet still does, then you more than likely need to replace your charcoal canister.

    It isn't difficult at all to replace, and should really take you no more than 30min. If you can change your own motor oil, then you can swap this part out. I purchased my part used (hopefully it won't cause a similar issue), and new ones cost roughly $150. If purchased new, it should come with little hose attachments and one time clamps on them. But the install is still the same, just I removed a different clamp (on the canister) vs ones on the evap hard lines. Anyways, it isn't rocket science. It's just the removal of a couple nuts, couple studs, and couple clamps. Install in reverse.

    Parts needed:
    -ramps
    -10mm socket and ratchet (small extension makes things easier)
    -1/2" (not sure what this is in metric) deep socket
    -new clamps (if you already have the replacement canister, you can guestimate the size of the clamps you will need. keep in mind, the hoses are rather thick)

    I would suggest you use ramps to raise your back end for this task. The reason I say, is because your emergency brakes work on the rear brakes, and not the front. If you do something like only jack up the rear, you are going to hurt yourself.........badly. You can place the car in gear to counteract this, but eh. Just get ramps or jack the entire car up and leave on jack stands. Anyways, place your ramps in place on the rear tires, back up onto them, and apply the e-brake.



    The charcoal canister is located underneath where the spare tire would be located, on the undercariage of the vehicle.


    Remove the 3 10mm nuts holding the cover in place and move cover to the side


    After that, use the 1/2" deep socket to get the 3 studs out holding the canister to the vehicle (they look like 3 nuts, but they aren't). Let the canister drop, and it will give you better room and angles to get at the clamps. If you have not become well aquainted with the one time clamps, you should become very familar with them. Over time, you will find your own easiest way of taking them off. Anyways, take off the one time clamp that holds the evap semi-hard lines to the canister. I removed the ones that are applicable to what I needed to remove, and you should only remove the ones that you need to get the canister out.


    And just reinstall in reverse. It's easiest to mount the canister back onto the car first, then tighten the clamps. Just be sure to watch orientation of your clamps upon reinstallation, because space is limited when placing the cover back on.



    Button everything back up, and enjoy pumping your gas without cursing out the pump. As stated before, it's not rocket science. It's just easier to have a write up laying around than not.

    disclosure: Niether I, Audizine, or any of it's members are responsible for any mishaps that may occur
    Last edited by Seerlah; 08-24-2017 at 09:14 AM.
    I hate it when my car acts like a little bitch, treating me like a bitch

  2. #2
    Veteran Member Four Rings revolution337's Avatar
    Join Date
    Apr 03 2009
    AZ Member #
    40692
    My Garage
    4.2 A4, 82 Vanagon, Mk7 Sportwagen
    Location
    Pennsylvania

    Always a source of such useful information

    shoot, I didn't even know where the canister was on our cars
    Life is too short to drive ugly cars.

  3. #3
    Senior Member Three Rings Audi_A4_'s Avatar
    Join Date
    Jan 21 2011
    AZ Member #
    69783
    My Garage
    2011 Subaru Legacy
    Location
    Russell Springs, Ky

    Good stuff. I did not know either. Thanks
    01 Audi A4 1.8t Qu (Bone stock for now except for the wheels)
    wifes car 2011 Subaru Legacy
    xbox gamertag=== Killir240sx

  4. #4
    Veteran Member Four Rings 2.slowT's Avatar
    Join Date
    Sep 24 2006
    AZ Member #
    11971
    My Garage
    2002 Audi A6 2.7T
    Location
    Minneapolis MN

    I also appreciate this! My car does this and I never bothered to find out why. I will replace this soon.

    Thank you!
    2002 A6 2.7T Sport
    2000 A4 Avant Daily


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  5. #5
    Account Terminated Three Rings
    Join Date
    Jan 09 2011
    AZ Member #
    69259
    Location
    Pleasant Gap PA

    If anyone is interested I have a used good one in known good shape without issues for 55 bucks shipped.

  6. #6
    Veteran Member Four Rings howardfootball's Avatar
    Join Date
    Oct 20 2010
    AZ Member #
    65975
    My Garage
    '57 Ford Thunderbird
    Location
    MD

    Thanks for this write up Seerlah. I always have that problem at the gas pump and never could figure out why.

  7. #7
    Veteran Member Four Rings RENOxDECEPTION's Avatar
    Join Date
    Nov 04 2012
    AZ Member #
    103464
    My Garage
    2000 B5 A4 1.8TQM, 2000 B5 A4 1.8TQM
    Location
    Reno

    Just to bump this with some additional knowledge, a good way to test if your charcoal canister is bad is by disconnecting it, plugging the line that goes to the N80, and going to fill up with gas.

    If you're able to fill up without any problems, you can be sure it is your charcoal canister.

    Just for those on the fence about spending $150 on something they aren't sure will fix the problem. :)


    Also, Mitch, you should rehost these on imgur, not sure if that extension works anymore.
    Last edited by RENOxDECEPTION; 10-27-2017 at 05:55 PM.

    2000 Audi A4 B5 1.8TQM AEB/06A
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    2000 Audi A4 B5 1.8TQM K24 Turbo, AEB Wideband

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