A Start with an Automatic Shut down?

Your crankshaft sensor b is bad this will automatically shut down a vehicle and not allow it to start

Have you checked base fuel pressure with a gauge yet ?
Sounds like the fuel pump may have finally died.

Vacuum Leak

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

it sounds like your ignition module is failing, when the car dies, take off one spark plug wire from the coil and crank the key, see if there is spark. one other issue may be the crank position sensor which can also stop the module from firing a spark

YES, the fuel cut off switch is located on the passenger side of vehicle. remove the side panel and on the firewall you will see a small black box with a red button, press red button down to activate. turn ignition on and you should hear pump turn on for a quick brief second.

sound like the lift pump!

this is probably a safety. no explosion, shut down. check to make sure no wires were cut/damaged and look in the trunk for an emergency shut off. there might also be a shut down relay onboard. if there is it's under the hood in the relay box.

Jus the motor shut off? Or did all the gagues, lights, everything seem to shut down? If all the gagues acted up, sounds like the ignition switch, not the lock cylinder, the acutal ignition switch.