How to judge the quality of carbon canister solenoid valve

If the car carbon canister is damaged, there are generally the following situations:

1, the gun jumps when refueling, or gas is ejected when opening the tank cover;

2. Gasoline vapor or oil droplets appear at the atmospheric port of the carbon canister;

3, refueling weakness, frustration, unstable idle speed, high and low;

4, flameout can't start, driving with abnormal sound.

The main function of the carbon canister is to adsorb and filter the gasoline vapor in the fuel tank, and let the fuel vapor enter the engine to participate in the combustion through the control of the electromagnetic valve, so as to reduce the fuel consumption and prevent the air pressure in the fuel tank from being too high.