Originally Posted by Compsystems
Sounds like a VATS issue. If the computer cant read the chip in the key the motor will only run for a second then shut off.
If the dash still works you usually get a "Security" light flashing.
If the ignition cylinder , wiring and key are in good condition you can try a VATS relearn procedure and see if it will learn the key code again.
Since you are going to swap this into a different vehicle you can ask your tuner to disable VATS completely.
This is very common.
That's not true......vats disables the starter and fuel at least in the cars it does.