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Can charcoal canister be cleaned or replaced?


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I really can't imagine it failing - it's just a canister of activated charcoal that traps gas vapors and lets them get sucked into the engine at the appropriate time.

 

However, if it's not getting fully purged and somehow purging during the emissions test, it could throw the hydrocarbon readings through the roof. If you put a vacuum line on it while the engine is running for a while, it should suck enough air through it to purge out all the gas vapors.

 

There's also the actuation solenoid to check. I don't know exactly how it works on the Subarus, but there should be a vacuum valve that opens to purge the canister. If that's sticking or not working, it could cause problems too.

 

-=Russ=-

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