hey guys im having this continue issue with my fuel system. my setup is a 77 c10 that came with dual tank setup, however i have a fitech efi system with a fuel command center. i deleted the charcoal canister and the command center vent is vented to the hardline vent on my truck. I have my gas cap changed to a vented gas cap. Keep in mind the driver side tank never worked ever since i bought the truck. whenever i switch to driver side tank the gas gauge reads passed full, so it has to be a ground issue or the sender. i disconnected the vent line from the driver side and capped it, however i still have the outlet hooked up to the selector valve. The damn thing is still building too much pressure which causing the fuel to gush out from the gas cap. any suggestions?