What are the symptoms of a faulty canister purge solenoid valve?

[StLilliana]

The specific symptoms of a damaged canister purge solenoid valve are difficulty in engine starting and fuel vapor leakage. The related causes are introduced as follows: Difficulty in engine starting, canister purge solenoid valve always open: Since the canister purge solenoid valve is always in the open state, the air in the intake pipe will be filled with fuel vapor. When the engine starts, the excessively rich combustible mixture will cause difficulty in engine starting or even stalling. Fuel vapor leakage, canister purge solenoid valve always closed: Since the canister purge solenoid valve is always in the closed state, the fuel vapor adsorbed and stored in the canister cannot be discharged, resulting in increased pressure in the fuel tank and ultimately causing fuel vapor to leak from the pressure relief valve of the fuel tank cap.