There may be the following reasons for the decrease in engine power of a car:
Too much carbon deposits in the engineWhen there is too much carbon deposition inside the engine, the ignition energy of the car is reduced, and the intake efficiency decreases, resulting in a decrease in the power of the engine.
The air intake system is not smoothIf the air filter is not cleaned in time for a long time, the air volume will be insufficient, and the combustible mixture will be too thick, which will reduce the engine power.
The fuel supply system is not smoothFor example, adding an inappropriate fuel label will lead to a decrease in the output power of the car and a decrease in power.
Spark plug efficiency is reduced: Spark plug damage can affect ignition efficiency, which in turn reduces engine power.
The water temperature is too high: The oil temperature in the engine is too high, resulting in poor lubrication effect, increasing mechanical wear and reducing engine power.
There was a knock in the cylinder: It is possible that there is a problem with the quality of the fuel, which will also affect the normal operation of the engine, thus reducing the power.
Insufficient engine coolant: Insufficient coolant can cause the engine to overheat, which can affect the performance of the engine.
The engine oil is insufficientInsufficient oil supply will increase the load of the engine, so that the engine heat dissipation is poor, resulting in poor lubrication effect, increasing mechanical wear and reducing engine power.
Engine radiator failure: A failure of the heat sink will affect the heat dissipation of the engine, causing the engine to overheat and thus reduce the power.
The above are just some of the common reasons that can lead to a decrease in the power of a car's engine, and the specific causes may vary from car to car. If your vehicle experiences a decrease in engine power, it should be inspected and repaired promptly.