Ford Repair Questions? Ask a Mechanic for Answers ASAP
The PCM didn't fail a lot of this vehicle. It sounds like you have a failing frame mounted fuel pump. The alternator charging only sometimes is common of an alternator failure on this particular vehicle.
I would change the pump for sure. Once that is done I would have the alternator tested by a VAT 40 to see if the diodes are bad. Usually the internal diodes fail