Incorrect Throughput of Fuel Tank Ventilation System?

[OWeston]

Abnormal throughput in the fuel tank ventilation system is usually caused by a blockage in the activated charcoal canister or the canister purge valve. Below is an explanation of the functions of the fuel tank ventilation system: 1. Noise reduction: During driving, the exhaust gases leave the engine at high pressure, generating significant noise. The exhaust pipe contains a muffler, which helps reduce noise. 2. Emission control: The automotive exhaust system includes a "three-way catalytic converter" device that reduces pollution. This device converts harmful gases such as carbon monoxide, hydrocarbons, and nitrogen oxides emitted from the vehicle's exhaust into harmless carbon dioxide, water, and nitrogen through oxidation-reduction reactions, thereby purifying the exhaust and reducing air pollution.