Hello all. I have TWICE experienced an emissions fail regarding the ARIZONA "Fuel Tank Pressure Test". Since I have confirmed through home testing that my fuel tank maintains pressure from the gas cap through all the lines up to the evap /charcoal canister, my question to anyone who may know is: "IS THE EVAP CANISTER DESIGNED TO HOLD TANK PRESSURE ?" "IS THERE A CHECK VALVE WITHIN THE CANISTER BODY @ THE VENT WHICH BLOCKS AIRFLOW?" I have attached an airflow line drawing and a photo of the evap canister in question to avoid any confusion as to what canister I'm referring to. Is the canister bad or are the folks at the emissions testing station wrongfully including the evap canister within the "fuel tank pressure" test? Any input will be greatly appreciated.