VEHICLE HAD JUST RETURNED HOME AFTER BEING DRIVEN A CONSIDERABLE DISTANCE. VEHICLE SHUT OFF FOR A FEW MINUTES WHEN FIRE STARTED UNDER THE HOOD AND MOVED INTO CAB. INSURANCE COMPANY HIRED A FIRE ORIGIN AND CAUSE ANALYST AND IT WAS DETERMINED THAT FIRE WAS CAUSED WHEN FUEL LEAKED FROM THE BANJO FITTING ON THE FUEL FILTER ONTO THE HOT SURFACE OF THE ENGINE. THE BANJO FITTING ON THE LOWER PORTION OF THE FUEL FILTER WAS COVERED WITH A HEAVY LAYER OF FUEL VARNISH. THE BOLT IN THE BANJO FITTING WAS CHECKED AND FOUND TO BE EXTREMELY LOOSE. THIS OCCURRED ON 6.0L DIESEL ENGINE. THERE LOOKS TO HAVE BEEN SIMILAR PROBLEM ON GASOLINE ENGINES WHICH HAD A RECALL DATE OF 6/7/05 AND NHTSA ID NUMBER OF 05V266000. WOULD LIKE TO KNOW IF FORD HAS SEEN PROBLEM ON DIESEL ENGINES?*JB