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charcoal canister

can someone explain to me if the charcoal canister in early commodores can stuff up and if so what happens or what can happen if it does stuff up? like get clogged or whatever?
Thanks
Grant

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Grant I've had a few HXs HZs and WBs with charcoal canisters for many years and many Kms..they would be the same as the early commodore vintage...in all those years I've never had a problem with them or undertaken any maintenance on them...maybe a perished hose..so from my experience to date I haven't had one stuff up...the purpose of the canister is to absorb fuel vapours from the tank when the engine isn't running...actually looking at the service requirements there is a recommendation to replace the canister filter at the bottom every 40,000km...I doubt anyone does..it could possibly be cleaned...I'd say that is to ensure the system absorbs the vapours efficiently to reduce emissions...as that is it's only purpose..a possible symptom if the canister is blocked or not functioning may be excessive fumes around the petrol cap if they can't vent into the canister?...I don't thgink it would affect the running of the engine...

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Andrew

eah I only ask because im trying to figure out why my carby is having fuel forced through the idle circuit channels so hard that its leaking out the gasket into the vaccuum chamber that operates the power valve and making my caR RUN RICH AS HELL... im wondering if the return system os blocked and creating some issue and too much pressure in the lines and therefore the fuel leak issue... but ive put a fuel pressure regulator on now hoping that helps

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you could disconnect and plug the canister to carburetor hose and try it for awhile to see if the problem persists. Technically you are over riding a pollution control measure but attempting to eliminate a cause.

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Andrew

you could disconnect and plug the canister to carburetor hose and try it for awhile to see if the problem persists. Technically you are over riding a pollution control measure but attempting to eliminate a cause.

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Andrew

my motor and dizzy have set up for lpg so does that mean the charcoal canister is still important since I run 98 and the canister is originally for the old leaded petrol yeah?

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if you run on lpg only and have no means to run on petrol there would be no pollution reason to need a charcoal canister..if you have the tank connected and can run on duel fuel then technically (to comply with the ADR) you need it as well as the other emission control equip. The control is about fuel vapours (hydrocarbons) and general pollution not specific to lead... running on unleaded doesn't stop fuel evaporation..in fact I think modern fuels are worse for evaporation than their predecessors...esp in small engines like scooters and mowers it can evaporate out of the carby very quickly

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Andrew

oh ok I was under misconception.. I thought the unleaded fuels were introduced due to being alot cleaner than the old leaded petrol and therefore better for the environment in general.. maybe after its been burnt and used... not before and evaporating away into the atmosphere. I never thought of that side of it.

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unleaded is a lot better for the environment because it doesn't contain lead which is toxic especially in young children. A reason why lead was also removed from many paints, domestic plumbing and even makeup. Hydrocarbons are still a problem with unleaded fuel esp with a car with no catalytic converter ..but at least one environmental nasty the lead is gone...it did have advantages for engines though and why it was originally added back in the 20s..

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Andrew

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