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How to Distinguish Between a Good and Bad Charcoal Canister Solenoid Valve?

1 Answers

RoseFitz

07/30/25 2:07am

There are several methods to determine whether a charcoal canister solenoid valve is functioning properly: 1. Unplug the solenoid valve's connector. If the suction stops, it indicates the solenoid valve is working correctly. If suction continues, the valve is stuck in the open position. 2. Start the engine and let it idle. Remove the pipe connected to the fuel tank. You should feel suction at the canister's connector at a frequency of about two to three times per second. If there is no suction, the valve is stuck in the closed position. 3. The charcoal canister solenoid valve is a device installed in vehicles to reduce air pollution caused by fuel vapor emissions and improve fuel efficiency. When the car starts, the solenoid valve opens, releasing adsorbed fuel vapor into the intake manifold for combustion in the engine.

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