What are the reasons for the high fuel consumption of BMW 320?

[CharlieLynn]

Reasons for increased fuel consumption in BMW 3 Series: 1. Poor ignition: Excessive spark plug gap, insufficient ignition coil energy; 2. Poor fuel injector atomization: Malfunctioning fuel pressure regulator, excessively high fuel pressure; 3. Excessive engine carbon deposits: Some of the injected gasoline is absorbed by carbon deposits; 4. Sensor failure: For example, a faulty coolant temperature sensor can cause the engine to mistakenly believe it is still in a cold state, continuously sending fuel injection signals, leading to high fuel consumption; 5. Oxygen sensor failure: This can cause fuel correction to fail, and the computer will continuously send fuel injection signals. A faulty air flow meter can result in incorrect intake data.