EVAP valve operating principle of the fuel vapor venting system

Exactly as colleague Carrot wrote. I will only add that it is about ECO, nothing more. In the case of EGR, the eyes were soaked with an additional reduction in exhaust gas temperature. Equalizing the pressure in the tank has nothing to do with the correct operation of this system, all you need is an unobstructed carbon tank and unobstructed pipes. The system only sucks the vapors concentrated in the cartridge itself, in the event of negative pressure in the tank, it sucks air through this cartridge itself (along with part of the vapors into the tank). Not really the system, the culprit here is the inlet vacuum and the open valve or the vacuum in the tank. To sum up, the system is not hermetic because it simply cannot be. In a sense, the role of the valve is played by activated carbon. What I'm going to, among the bits and pieces, is that the EVAP valve itself causes a vacuum in the tank and therefore we have no power. We do not have the power because we have a bug in the controller. The only thing the controller can and can do is "check" the valve itself.