our 98 chevy c3500 dump truck wont start. it happend randomly twice where it would turn over no problem and start maybe on the third or fourth try. Today we were picking up some downed trees, and we went to start it, but no luck. it would just turn over and over. its got the 5.7L w/ throttle body injection, so we put some gas (no starting fluid) into the tbody and it would start up, but after burning through that fuel it would not stay running, even w/ the throttle totally open. this leads me to believe its a fuel problem, we havent checked the coil yet though. any ideas guys?