My pathfinder worked great for years. One day it just wouldn't start. Cranks over fine but won't kick. Changed fuel filter checked fuel pressure. Changed crank sensor, distributor (includes cam sensor, coil, cap), ECM, checked for broken wires/bad grounds in easy to get at places. The injectors aren't getting power so they aren't opening. Help!

you should have 12volts on one pin at the injectors with the key on.the other pin is the ground signal from the ecm.

You should have checked that is teh battery ok and full charged , it is cause i have faced the problem that the lights have been lit the hole night and in teh morning when i saw it , i did switch it off but my vehicle hadent any power to start the car , it didnt even cranked after a few tries.

one post at the injectors has 12 volts, the other has no ground or signal from the ecm. Any ideas???

have you checked your injector fuses and relays no power to injectors right
if they are good, move to your key switch for answers

Did you ever find out the problem to your car and what was causing it?