Hello Scotty I have a 2000 Nissan Frontier 3.3 liter I have no signal to my crankshaft position sensor I've changed the sensor out the car just cranks will not start. could it be a possible ECM problem

yes, either wiring from computer to sensor is shorted, or computer circuit is badd

Thank you for the input Scotty. I also noticed that my fuel pump is not running. Fuse is good and pump realy is good. Could a faulty signal from the crankshaft stop the fuel pump from priming. Thank you.