What are the reasons for high fuel consumption in Xichai engines?

[DamianLynn]

Xichai engines may experience high fuel consumption due to the following reasons: 1. Clogged air filter causing restricted airflow, leading to an overly rich mixture, or a blocked exhaust pipe. 2. Incorrect idle speed adjustment, such as an incorrect CO setting. 3. Engine coolant temperature being too high or too low. If the coolant temperature is too high, the coolant may boil easily, reducing power and increasing fuel consumption; if too low, the mixture may not atomize properly, decreasing engine power and increasing fuel consumption. 4. Inaccurate ignition timing, such as delayed ignition. 5. Low cylinder pressure. Practical experience shows that when cylinder pressure is below the specified value, fuel consumption increases by 20% to 25%. 6. Incorrect valve timing. 7. Stuck open exhaust gas recirculation (EGR) valve. 8. Using summer lubricants in winter or overfilling engine oil.