Dodge Diesel/Cummins Mechanic Advice Needed

Update:

I've replaced the lift pump (NOS), injector pump (rebuilt from reputable company that I used the last time), and ECM (refurbished from a reputable company), drained all the old fuel out of the fuel system, put in fresh 5 gallons of diesel, bled the fuel system, and it still won't start. Due to replacing the injector pump today, there is finally fuel coming out of the injectors. There are no codes on the ECM. I'm about ready to have this thing towed to the local diesel shop. I'm disgusted and have $2400 less money now. I can't wait to see what they will come up with and how much that will cost me.