As posted earlier, pull injectors and have cleaned,flow tested and balanced....I use Brucatosvs.com
It would be the same thing as leaving the ignition switch on your car on without the engine running. What would be the purpose?
Check harness connections and ECM connections as its loosing its 12V and thinks has been turned off and then back on...
So I wonder now if the EST is subject to the same self destruction as the Pertronix if the key is on with the motor not running?