greetings kb9vzl, when your car died, did the check engine light come on? when you try to start it, does your security light on the dash stay on or go out after a few seconds. when you say you changed the ignition switch, was it the one under the dash mounted on the steering column or the ignition lock in the column? if the check engine light comes on is there a code stored in the memory? if the security light comes on and stays on, you definitely have a problem in the vehicle anti-theft system.