What to Do When the Engine Noise Increases?
1 Answers
Here are the reasons why the engine noise suddenly increases: 1. Dirty throttle or excessive carbon deposits on the fuel injector: The most common cause of car shaking is a dirty throttle or excessive carbon deposits on the fuel injector. When there is too much carbon buildup inside the engine, the gasoline sprayed by the cold-start injector will be largely absorbed by the carbon deposits, resulting in a lean mixture during cold starts. This makes starting difficult, and the combustible mixture in the engine alternates between lean and rich, causing idle shaking after a cold start. 2. Excessive engine oil: When too much engine oil is added, it creates unnecessary resistance to the crankshaft's operation, which affects power output and increases fuel consumption. The amount of oil entering the combustion chamber also significantly increases, leading to more carbon deposits in the combustion chamber. This increases the resistance to piston movement, reducing the engine's power. Additionally, excessive oil increases the stirring resistance of the crankshaft connecting rod, resulting in louder noise. 3. Old engine oil: Over time, engine oil becomes thinner, and carbon deposits accumulate more. Thinner oil tends to accumulate, leading to even more carbon buildup. When new oil is replaced, the engine may struggle to adapt to the new viscosity, potentially causing higher RPMs and increased engine noise.
