...not sure what my prob. is???

Ok, my car had jumped time just a few months ago, then it was retimed with new timing belt, ect. Then when i was driving it it suddenly stalled, i popped the clutch and it started up again. Then quickly stalled. I DO have fire, but does anyone know what else it could be besides jumping time again??? It did backfire once when i tried to start it up. HELP!