1999 Buick Century car starts and run and dies

Engine Performance problem
1999 Buick Century 6 cyl Two Wheel Drive Automatic

if the car sets overnight when u first start it will run for about 10 mins then shuts off, turn key off then back on the car starts and runs for 1-2 mins then shuts off. Replaced the fuel pump, fuel filter, cam sensor, coils and ignition mod, ignition wire in the colum. When the car was running, I disconnected a plug wire, egr, mass air flow and no check engine light came on. Could the pcm need to be flashed?Engine light does work.