Didn't know difference til I was done. Old was a bit new one was not. Everything plugs up . has fire and fuel. 125 pounds compression. Engine ran in other car. Only other difference I found was number of reluctor points on cam. New motor has 1, old one has 3. Sending unit same, cam same. ???

I am having a hard time understanding you or what is happening outside of the car not wanting to start up for you. Was your car in an accident and is no longer running now?