Several updates, the P0455 code as well as P0457 code are back. Biting the bullet and installing a new vapor canister solenoid and charcoal canister as well as fuel inlet tube and hoses (tested the underhood purge valve, its good) Smoke test shows no leaks. Also had some vibrations from the front end. Slight wear on the front inside tires. The culprit? LCA's, which are the only suspension parts not replaced in my initial overhaul (although I did the ball joints on both). Just ordered 2 new Moog lca's.