[paul mora]

The ignition switch is a switch that shuts all unnecessary power off and engages the starting system to crank the motor and get it started. Once you release the switch back to the running position it keeps all the same necessary stuff engaged to keep it running and stop cranking. Unless you have done some changes to the wiring system it sound like the ignition switch is bad. When you release the key to run the hot wire that keeps it running is not making contact. Before you replace the switch you should check to make sure all the wires are connected and if you have a volt meter check the switch in each position when turning the key it be sure it is the switch and not a back wire or connection downstream from the switch