Fuel Cutoff Mode

The control module cuts off fuel from the fuel injectors when certain conditions are met. This fuel shut off mode allows the powertrain to protect itself from damage and also improve its driveability.

The control module disables the injectors under the following conditions:
^ Ignition OFF (prevents engine run-on)
^ Ignition ON but no ignition reference signal (prevents flooding or backfiring)
^ High engine speed (above red line)
^ High vehicle speed (above rated tire speed)
^ Extended high speed closed throttle coast down (reduces emissions and increases engine braking)