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Home >> Chevrolet >> 2004 >> Optra5 Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - 1.4L DOHC - Description And Operation >> Description and Operation >> Fuel System Description >> Deceleration Mode

Deceleration Mode

The engine control module (ECM) responds to changes in throttle position and airflow and reduces the amount of fuel. When deceleration is very fast, the ECM can cut off fuel completely for short periods of time.