What makes it not want to start after I shut it off

What is your question?

Truck will do great most of the time and sometimes i shut it off and it want start back I have to keep trying and trying or sometimes pushing it off works but now truck is just running bad back firing threw the brether ive put new fuel pump and filter in it hoping that was the problem but still no luck please help me on this its my daughter truck and she ready to drive agin