Fuel Shut-Off Mode

The engine control module (ECM) has the ability to completely turn OFF all of the injectors when certain conditions are met. These fuel shut-off modes allow the ECM to protect the engine from damage and also to improve the vehicles driveability.

The ECM will disable all of the injectors under the following conditions:

• Ignition OFF - Prevents engine run-on
• Ignition ON but no crank position (CKP) signal - Prevents flooding or backfiring
• A high engine speed - Above the red line
• A high vehicle speed - Above the rated tire speed
• Closed throttle cast down - Reduces the emissions and increases engine braking.