99 F150 5.4 engine cuts out 5 secs after start. Replaced, IAC PCV Cam Pos Sensor Fuel filter. Voltage at PCM and Ful Pump Relays as well as Fuel Pump. Votlage ok at TPS.I am at the end of my rope, can't figure out why Fuel pump stops Pumping? Any ideas?

 

Crank position sensor perhaps? Does the pump stop and kill the engine or does the engine die than the pump stops? MAF cleaned?