Engine cranks, but does not start?

I got the car off a trade. It was running for a few days. The last owner said that I had to change out the crankshaft position sensor Before I changed it, I filled the car up with gas and once I parked it, it did not turn back on, so I changed the crankshaft position sensor didn’t clear the code yet and it wasn’t starting so I check to see if it’s getting in spark And it is. So I listen to see if the fuel pump turns on did not hear a hum wired it direct and still didn’t hear a hum so I’m thinking it could be that but need opinions on what else it could be because I put starting fluid to see if it would start and it didn’t start. So could it be the crankshaft position sensor that I haven’t cleared the code yet stopping it from starting or could it just be the fuel pump went thoughts and opinions please help.