What Are the Common Engine Faults and Troubleshooting Methods?

[DeJames]

Common engine faults include: 1. Mechanical component failure in the engine, where cylinder wear leads to excessively low cylinder pressure; 2. Malfunction of the coolant temperature sensor; 3. Failure of the air flow meter or intake pressure sensor; 4. Malfunction of the throttle position sensor; 5. Excessively high fuel pressure; 6. Fuel injector leakage; 7. Oxygen sensor failure; 8. Ignition system fault; 9. Incorrect valve timing. Engine troubleshooting methods: 1. Inspect for mechanical faults in the engine, check if the exhaust system is blocked, and examine the thermostat in the cooling system; 2. Measure the coolant temperature sensor, ensuring its resistance values at different temperatures meet the standard; 3. Test the air flow meter or intake pressure sensor, verifying their readings comply with the standard; 4. Inspect the throttle position sensor; 5. Measure the fuel pressure.