2004 Kia Sorento Will not start

I replaced the crankshaft position sensor and reassembled the car. The engine will not start now. It turns but will not fire. The only thing that is not replaced is the coolant and this is completely empty. I have not refilled it incase I need to drain it again. Could this cause the engine to not start? If not, is there something else to check or reset? It is not pulling any codes right now.