same problem. if your lucky it is the evap vent valve, easy fix. if that don't fix problem try the line from the tank to the vapor canister to see if it is plugged. if it is you need to replace or unplug the line. then go to rock auto and get a new vapor canister as the old one is the reason the line plugged up by the charcoal from the canister. that fuel line being stopped up means you have to drop the tank to take it off.