Also check the evap test port (has a green cap on it the size of a valve stem cap) located between the air cleaner housing and the engine. The hoses that are on either side of the test port crack. Also take a good look at the fuel filler tubing from the gas cap to the fuel tank. They like to rust out especialy up around the end of the tube by the gas cap.

By the way the evap canister is located on the left frame rail behind the front subframe and in front of the fuel tank.