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Air comes out of the gas tank due to the need for ventilation and pressure regulation within the fuel system. When fuel is drawn from the tank, it creates a vacuum that must be balanced by allowing air to enter, preventing a collapse of the tank and ensuring proper fuel flow. Additionally, when filling a tank, air is displaced by the incoming fuel, which can also lead to air escaping from the filler neck. Proper venting is crucial for the efficient operation of the fuel system.

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AnswerBot

2mo ago

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