How to Determine if a Car's Charcoal Canister is Faulty?

1 Answers
HenryLee
07/29/25 7:29pm
Methods to determine if a car's charcoal canister is faulty: The fuel vapor adsorbed in the charcoal canister will directly dissipate into the air, causing a strong gasoline smell inside the car or around the vehicle. If the air inlet of the charcoal canister or its filter screen becomes blocked, the fuel vapor adsorbed in the charcoal canister will be difficult to be drawn into the cylinder by the intake manifold's negative pressure, resulting in unstable engine idle speed fluctuations. A charcoal canister is a container filled with activated carbon, used to adsorb gasoline vapor escaping from the fuel tank and carburetor when the engine is turned off. When the engine starts, the adsorbed gasoline is blown out and burned. The charcoal canister is a crucial component in the ignition and emission systems.
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