Fuel Cutoff Mode

The PCM cuts OFF fuel from the fuel injectors when the following conditions are met in order to protect the powertrain from damage and improve driveability:

• The ignition is OFF. This prevents engine run-on.
• The ignition is ON but there is no ignition reference signal. This prevents flooding or backfiring.
• The engine speed is too high, above the red line.
• The vehicle speed is too high, above the rated tire speed.
• During an extended, high speed, closed throttle coast down. This reduces emissions and increases engine braking.
• During extended deceleration, in order to prevent damage to the 3-way catalytic (TWC) converters