Helpppp! wagon wont start now!

It cranks but will not stay on...I thought it wasn't main relay so I replaced it. It started so I can make it home then I went to start it again and it wont stay on... I replaced the spark plugs,head gasket and groments. Also changed the air filter...it still wont start!!! Im thinking it might be the fuel pump...but I don't know. Any help would be appreciated thanks
Comments
You gotta quit spending and start reading