charcoal canister

Discussion in 'FJ Cruiser' started by bcheng4jc, Mar 4, 2017.

  1. bcheng4jc

    bcheng4jc

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    In Philly area. My charcoal canister has a stuck valve and is throwing CEL. I don't want to spend $600-$1k on a plastic box filled with charcoal, let alone $200-300 got a used one. Any way to fix existing canister of bypass it all and still pass emissions? Thanks in advance.

    2012 FJ TT

    IMG_4240.JPG
     
  2. firensteel

    firensteel

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    I don't know if this is only in Ca, but any emissions related equipment here is to be under warranty for 100K. You should check your local state laws to see if you are covered.
     
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  3. bcheng4jc

    bcheng4jc

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    Hmmmm, I don't think pa has that but I'll check. I'm over 90k but not quite 100k yet.
     
  4. BMThiker

    BMThiker I aim to misbehave Moderator SILVER Star

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    The leading cause of charcoal canister failure is "topping off" your tank after the gas pump has clicked off. When you add that extra .4 gal it fills up the neck and leaks fuel into the canister that is designed to handle fumes (not fluid). I don't know if you do this (no accusations here), but thought it an appropriate PSA for all who read this.
     
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  5. firensteel

    firensteel

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    That is a great reminder for everyone. I learned that 25 years ago from Click and Clack on NPR and now thought it was something everyone knows. Good reminder.
     
  6. bcheng4jc

    bcheng4jc

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    Yea, I never top off. Click and clack, haha. Those brothers were hilarious!
     
  7. 92RedToy

    92RedToy

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    Have you found any remedies? My 11 Fj Cruiser just gave me a similar code (code p0441 for the evaporative emissions) and I'm loosing MPG's...

    I'm hoping that it's just the gas cap!
     
  8. Prairie Swamp

    Prairie Swamp

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    Been fighting emissions codes on my Taco so have been doing some research. Insufficient purge flow means that after you start the engine the system tries to flow fresh air through the canister to move the stored gas vaoprs out of there and deliver them to the intake to be burned.

    So the computer is sensing that there isn't enough air moving through the canister to achieve this. On the FJ I am not sure of the methodology used to determine this. So insufficient purge flow "could" be a plugged canister (pretty likely actually) or an incorrectly functioning purge valve, or a blocked purge line between the canister and intake, or possibly something else (ECU but not likely.) It's probably not the gas cap unfortunately.

    I used to make carbon cans. The little bits of carbon in there tend to go on a jail break after a while and plug stuff up. Or as someone mentioned if the tank was overfilled too often liquid gas may have gotten in the canister which is not good. Hopefully it's the purge valve but do the proper homework and testing before shotgunning parts at it.

    Good luck.
     
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