Systems and methods for fuel vapor canister purge routing

A fuel system, comprising:

• a fuel vapor canister comprising at least a load port and a purge port;
• a canister purge line coupled between the fuel vapor canister and an engine intake;
• a purge routing valve coupled to the canister purge line, such that when the purge routing valve is in a first conformation, the canister purge line is fluidically coupled to the fuel vapor canister via the purge port, and when the purge routing valve is in a second conformation, the canister purge line is fluidically coupled to the fuel vapor canister via the load port and not via the purge port;
• a fuel tank coupled to the load port via a fuel tank ventilation line, wherein the purge routing valve is coupled to the load port via the fuel tank ventilation line;
• and
• a vapor blocking valve coupled within the fuel tank ventilation line between the fuel tank and the fuel vapor canister.