How did the noise get louder after the car cleaned the accelerator?

There is too much oil. According to the query of China Auto Network, when the engine oil in the cylinder is too full, it will produce greater unnecessary resistance to the rotation of the crankshaft, which will affect the output of cooling power and increase fuel consumption. The amount of engine oil entering the combustion chamber is greatly increased, which increases the carbon deposition in the combustion chamber, increases the piston movement resistance and reduces the engine power. The carbon deposit in the cylinder is red and hot, which is easy to cause premature combustion. If it falls into the cylinder, it will aggravate the wear of the cylinder and piston and accelerate the pollution of oil. Secondly, too much oil will increase the mixing resistance of crankshaft connecting rod and noise will also increase.