What does engine derating mean?

[AlanaLee]

Engine derating refers to a reduction in engine power, which means the combustion efficiency of gasoline decreases, leading to a drop in the engine's output power. The reasons for derating include: 1. Excessive carbon buildup inside the engine, resulting in reduced ignition energy and decreased intake efficiency, causing weak idling; 2. Adding incompatible fuel grades or a blocked fuel tank vent, clogged fuel filter, or partial blockage in the fuel line from the tank to the carburetor, failing to meet the required fuel supply and resulting in an overly lean air-fuel mixture; 3. Long-term use of the air filter without timely cleaning leading to blockage, insufficient air intake causing an overly rich combustible mixture; 4. For vehicles equipped with turbochargers, failure of the turbocharging device.