I have a 2000 Kia sephia and the issue is the pumping gas nozzle keeps shutting/ tripping off after putting gas in for a few drops of gas. It takes a long time to fill the gas tank, even though I turn the gas nozzle sideways as I pumping gas and still keep shutting off at the gas pump. I checked the four components of the evap system fuel. On youtube,() the mechanic shows something about the air vent (through the fuel line) vapors are blocking. The charcoal canister, the purge valve, (both are replaced used by getting them at a junk yard) the purge canister solenoid (Intake-Manifold-Fuel-Tank-Vapor-Canister-Purge-Valve-Solenoid) and the buffer canister (the purge cannister solenoid and both are located by the intake manifold) seems to be working, since there is no engine light code on. Also, I blowed out the canister buffer located on the passenger side firewall behind the intake manifold. ( Emission Catch Tank Buffer Canister) I am baffled by this issue. I also tried to blow the purge canister solenoid and something there is blocking. It looks like a closed valve inside the purge canister solenoid and not open. Is that normal since the electrical connector is disconnected or should it be open? Any ideas? I appreciated any comments, advice, and/or feedback. Thanks for reading.