Here is the story. six days ago I changed my park brake pedal cause it broke. Which meant I had to pull the pcm. Un hooked the batts and pulled the pcm like I have before. Changed the park brake pedal and reinstalled the pcm. Truck fired up no prob. But I had no display on my switcher for my chip. So .I thought something might have moved when I pulled the pcm. pull the pcm and check and made sure everything looked good and re installed. Now my switcher works. Good to go. two days ago wife called and says truck wont start after a 20 min drive. I go out there and change the cps. Fires up no prob. Today she calls and says sitting at a light and truck died and wont start. Got it towed home. I go to ford and get a new cps and change it. Truck fires up no prob. She heads out to the store and same thing it wont start. I think it is my chip so I un plug the pcm and pull the chip. plug the pcm back in and it fires up. she goes out again to test it. and I makes it around the block and dies. wont start just cranks. unplug the pcm and plug it back in and it fires up. wtf?????????????? PLEASE help. It is our only vehicle. I don't have access to AE or a scanner at this time. I am leaning toward the pcm.