What causes the Chery Flagcloud 1 engine to make abnormal noise without burning engine oil?

[AmirAnn]

Reasons for the Chery Flagcloud 1 engine making abnormal noise without burning engine oil: Dirty air filter: The air filter is designed to protect the engine and reduce wear. It generally needs replacement every 10,000 kilometers. If not replaced timely, insufficient air intake may occur, leading to low idle speed and causing abnormal engine noise. Simply replacing the filter element can solve this problem. High-voltage line break: A high-voltage line break refers to the breakage of the conductor core in the high-voltage line, which can affect ignition and cause abnormal engine noise. Spark plug lifespan: Spark plugs have a limited lifespan. After exceeding 30,000-40,000 kilometers, the ignition efficiency significantly decreases, leading to abnormal engine noise. Carbon deposits and oil sludge blockage: After prolonged use, carbon deposits and oil sludge can accumulate in the throttle body, idle valve, and intake ports, causing poor air intake. This affects idle stability and results in abnormal engine noise.