car wont start

Hey I have a 1991 Honda civic and it wont start all the time. Some times it does and sometimes it doesnt, it will just turn over but will not start. I was thinking fuel pump, but the changed my mind because when push started the car will start just fine. So any help is appreciated.

That's weird... listen for clicks next to your left foot when you turn the key.

If you hear them, then it's not the main relay.