What Causes Loud Engine Noise in the Car?

[McDawson]

Loud engine noise in the car can be attributed to the following reasons: 1. Carbon buildup in the cylinders, throttle body, spark plugs, or intake system; 2. The use of incompatible fuel grades in the fuel system, leading to reduced engine output and power; 3. A clogged air filter that hasn't been cleaned in time, causing insufficient air intake and resulting in an overly rich air-fuel mixture; 4. Insufficient engine oil or coolant, or a malfunctioning engine cooling system. The engine is the device that provides power to the car. Its working principle involves converting the thermal energy of gasoline or diesel into mechanical energy by burning the fuel in a sealed cylinder, causing the gas to expand and push the piston to perform work.