Why does the Audi A4L shake when the accelerator is deeply pressed?

[SanJoshua]

Audi A4L shaking when the accelerator is deeply pressed may be caused by the following reasons: Damaged spark plugs: The most common fault causing shaking during acceleration is damaged spark plugs. Wear of the spark plug electrode gap leads to insufficient spark ignition, resulting in incomplete combustion of the air-fuel mixture and shaking during acceleration. Additionally, cracks in the ceramic part of the spark plug can cause the spark plug to fail to ignite, leading to one cylinder not working properly, which also results in shaking during acceleration. Poor fuel quality: Low-quality gasoline can cause poor atomization in the fuel injectors, leading to incomplete combustion of the air-fuel mixture in the cylinders, which also results in shaking when accelerating. It is recommended to use higher-grade gasoline after finishing the current tank and perform a fuel system cleaning.