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Posts Tagged: gas pump shuts off before the tank is full

Gas pump shuts off before tank if full

Why does the gas pump shut off before the tank is full? When the gas pump shuts off before the tank is full, the problem is most often caused by a failure in the vehicle’s evaporative emissions system (EVAP). The EVAP system is designed to prevent gas vapors from venting into the atmosphere during fill-up. Instead, the gas vapor is pushed into a canister filled with activated charcoal. The charcoal adsorbs the gas vapor. It’s designed to adsorb the vapor from a typical fill-up. Once the engine starts, the system … Read More


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