The canister is an emissions component that is designed to accept fuel vapors from the tank. At specific times, the fumes from the canister are vented into the engine to be burned with the fuel. It wouldn't cause the issue you have with running out of fuel at half tank. However, if one of the vents is stuck open, it could cause a lean fuel mixture.
You mentioned carbon-colored smoke. Was it a blackish, gray color?
Joe
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Tuesday, August 2nd, 2022 AT 12:31 PM