2002 Dodge Dakota Where do I start

Computer problem
2002 Dodge Dakota V8 Two Wheel Drive Automatic

Truck has been running great. Stopped at redlight after 5 miles of running it shut off, no studdering, when I tried to restart, fuel pump kicked in, injectors worked and RPM went crazy but truck did not start. After 6 hours truck started and ran for 60 miles home, then shut off and began acting up again, sat overnight started just fine. Someone said they think my computer is going out. Someone else saids camshaft senor. Where do I start?