Why does the newly replaced engine not perform as well as before?

[EverettMarie]

The reason why the newly replaced engine does not perform as well as before is engine carbon buildup. Engine carbon buildup: The carburetor of the engine is aging or damaged. The engine is the heart of the car, and the carburetor is undoubtedly the heart of the engine. Whether gasoline can fully combust in the engine mainly depends on whether the carburetor can atomize the gasoline into fine molecules. If the carburetor is aging or malfunctions, it will cause gasoline to enter the engine for combustion without being fully atomized, leading to the formation of carbon deposits. Additionally, whether the carburetor can fully atomize gasoline is also closely related to air quality. Definition of an engine: An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines, external combustion engines (such as Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, internal combustion engines typically convert chemical energy into mechanical energy. The term engine can refer to both the power generation device and the entire machine that includes the power device (e.g., gasoline engines, aircraft engines).