I just had the same exact issue with my 22re. Code 12 and 14. Well So far I changed the dist cap/rotor, plug wires and plugs since I needed to anyway. And the problem has not come back, however I have only driven the truck about 20 mi since. Initially it was on and off again. I think the distributor cap may have been the culprit.
Good luck!
ps: Its difficult to hear the fuel pump running inside the cab. I would turn the igniion to the On position, and push the Air flow meter door open (under the air cleaner) and listen for the Pump/or the relays kicking on inside the cab near the computer in the pass footwell. Its very rare for a fuel pump to go bad in these trucks.
