TIM A LONG PERIOD OF TIME IS A WEEK - MONTHS. YES BEHIND THE DRIVERS SEAT, AND THE LINE GOES DRY. WE THINK ITS A FUEL LINE PROBLEM AND LIKE YOU SAID ITS SYPHONING BACK TO THE TANK. IF I RUN THE TRUCK EVERYDAY IN GOOD WEATHER I DON'T HAVE A PROBLEM. I WAS THINKING OF REPLACING THE FUEL LINE AND SEEING IF THAT WOULD HELP.
