J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment DIESEL PROBLEMS

HELP!!!!!
WE ARE HAVING WITH FUEL STARVATION ON AN INTERMITTENT BASIS. BLEEDING THE FUEL LINE IMMEDIATELY RESTORES THE ENGINE TO RUNNING STATUS. HAVE CHCKED AND RECHECKED THE FUEL PICK UP, VENT LINES, FUEL LINES ETC. EACH TIME THIS HAPPENS THE FUEL FILTER IS EMPTY.
ANY AND ALL SUGGESTIONS WILL BE WELCOMED!