Car will not crank, will not start

1991 FORD EXPLORER ABOUT 100,000 MILES- CAR WAS DOING THE SAME AS THE 2002 EXPLORER CAR WILL NOT CRANK, WILL NOT START. JUST GIVES A " CLICK, CLICK " SOUND. SINCE I POSTED THIS QUESTION I HAVE REPLACED BATTERY, BATTERY CABLES, SELINOID, AND NOW I HAVE REPLACED THE STARTER AND NOW IT CRANKS BUT IT SEEMS LIKE IT S NOT GETTING FUEL. I BEGINS START UP BUT WILL NOT STAY ON ONCE I LET GO OF KEY. FIRST TIME I TRIED I PUMPED THE GAS WHILE CRANKING THE KEY AND IT STARTED AND THAT WAS THE LAST TIME. YOU CAN CLEARLY SMELL FUEL. NO LEAKS ! I RELEIVED THE PRESSUE AFTER I CHECKED THE EMERGENCY FUEL SHUT OFF SWITCH ( WHICH WAS NOT SHUT OFF). AFTER DOING ALL OF THIS, I WAS ABLE TO GET TO START AND THEN THAT WAS IT IT WOULD START BUT WOULD NOT STAY ON 1. MY ORIGINAL QUESTION WAS WHAT COULD FREEZE AN ENGINE( THIS WAS YOUR ANSWER TO THE 2002 EXPLORER) AND 2. ANY IDEAS ON WHY IT IS DOING THIS?

IT CRANKS BUT DOES NOT START IT WILL STOP CRANKING WHEN I LET GO OF THE KEY. SO I BELIEVE YOU ARE RIGHT WITH IT BEING THE FUEL FILTER. NEXT QUESTION, I HAVE TAKEN OFF THE RETAINING CLIPS ONE ON EACH SIDE, BUT UNABLE TO TAKE THE FILTER OFF, IS THERE SOMETHING HOLDING IT FROM THE INSIDE( ADDITIONAL CLIPS OR GRASPING DEVICE OF THAT NATURE) OR DO I NEED A SPECIAL TOOL TO REMOVE THE FUEL FILTER?