What causes the car to shake when releasing the throttle while driving?

[Espírito Santo]

Vehicle shaking during acceleration and driving: 1. Possible cause one: The most common fault causing shaking during acceleration is damaged spark plugs. Worn spark plug electrode gaps result in insufficient spark, leading to incomplete combustion of the air-fuel mixture and consequent shaking during acceleration. Additionally, cracks in the ceramic part of the spark plug can prevent sparking, causing one cylinder to stop working and resulting in acceleration shaking. 2. Possible cause two: Poor quality gasoline can lead to inadequate atomization by the fuel injectors, causing incomplete combustion of the air-fuel mixture in the cylinder, which also results in idle shaking. It is recommended to use higher-grade gasoline after finishing the current tank and perform a fuel system cleaning.