I WAS DRIVING NORTH (ON CRUISE CONTROL APPROX. 55 MPH) ON I 75 NEAR MILE MARKER 78 WHEN MY 1993 FORD F150 STARTING SMOKING UNDER THE HOOD. I PULLED OVER AND OPENED THE HOOD AND SAW THE ENGINE IN FLAMES. I HAD A FIRE EXTINGUISHER IN THE CAB SO I USED IT TO PUT OUT THE FIRE. THERE WAS ALSO A TRAIL OF FIRE UNDER THE TRUCK THAT A GOOD SAMARITAN EXTINGUISED AFTER HE STOPPED TO HELP. I CALLED AAA TO TOW MY TRUCK TO A LOCAL FIRESTONE SERVICE CENTER FOR REPAIRS. I BOUGHT THIS VEHICLE NEW IN 1993 AND NEVER HAD ANY RECALL ON IT. I FOUND OUT TODAY FROM MY INSURANCE COMPANY THAT THERE IS A DEFECT W/ THE CRUISE CONTROL SWITCH ON THIS MODEL FORD TRUCK. *JB