Ever since I got this truck about 2 months ago after it was in storage for 4 1/2 years, there has been this buzzing noice coming from the charcoal canister when it is parked (and maybe when it is running too). When I pull the foremost front hose (that goes to the fuel tank, I think), the noisee stops immediately. It's a rythmic buzz, like a vacuum pump. Is it time to replace the canister, or is there some other maintenance (or lubrication) I can do? Thanks.

'02 Double cab, 5 speed swap, dual T-cases, FZJ80 SAS, E-lockers F/R, 37" MTR's
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