What Are the Symptoms of a Faulty Charcoal Canister Solenoid Valve?

[VanEloise]

Here are the specific symptoms of a damaged charcoal canister solenoid valve: 1. Difficulty starting the engine, charcoal canister solenoid valve stuck open: Since the solenoid valve remains open all the time, the intake pipe will be filled with fuel vapor. When the engine starts, the excessively rich air-fuel mixture can cause difficulty in starting or even stalling. 2. Fuel vapor leakage, charcoal canister solenoid valve stuck closed: If the solenoid valve remains closed, the fuel vapor stored in the charcoal canister cannot be released, leading to increased pressure in the fuel tank. Eventually, the fuel vapor may leak out through the pressure relief valve in the fuel tank cap.