What Causes the Vibration in a Newly Replaced Engine?

[VanLeilani]

The reasons for vibration in a newly replaced engine: excessively high oil viscosity, insufficient belt tension, poor fuel quality, and engine cold starts can cause car vibration even with a new engine. Common causes of car vibration include a dirty throttle body or excessive carbon buildup in the fuel injectors. When there is too much carbon buildup inside the engine, the gasoline sprayed by the cold start injector can be largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts, making it difficult to start. If the engine vibration increases, it may be due to issues with the engine mounts. The connection points between the engine and the frame are equipped with engine mounts made of rubber material, which prevent the vibrations from the engine operation from being directly transmitted to the car body.