I have a heavy fuel smell after I shut the engine down, the fumes will fill my garage and even when it's outside I can smell gas if I walk past the front end. When I swapped engines I did away with the charcoal canister and capped the vent line that returns to the tank. That didn't work.. so much pressure built up in the tank that when I would remove the gas cap it would all but shoot out of the filler neck when I hit the last thread, even with a new vented cap. So I put the canister back in place which solved the pressure in the tank issue, but now I have the fumes. Would a new canister eliminate this? Can I bypass the canister and run the hose from the carb directly into the return line to the tank?