Civic wont start

I replaced my motor the other day. put it back in the way it came out. all connections went back on the same. heres the problem, it will carnk till the battery dies but wont fire up. but, it will fire up when i spray starter fluid in the intake, then dies after a few seconds. any suggestions?

it sounds like a fuel delivery problem. Maybe check to see if there is gas coming through the injectors or if the fuel pump is working? Sory i cant help more since i dont own a car yet.