my jeep will run for about 10-15 min than die ,and if i wait 30 min it will start again. it has a new fuel filter and the pump is comeing on when i turn the key ,it will fire with starting fluid but not run just a few coughs, is it possible the coil is bad and when it gets hot it wont give enough spark to fire the motor? anyone ever have this problem before or any ideas what to do next