Reasons for Engine Shaking When Accelerating Hard

[OCollin]

Reasons for engine shaking when accelerating hard are as follows: 1. The most common issue 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 subsequent shaking during acceleration. Additionally, cracks in the ceramic part of spark plugs can prevent sparking, causing one cylinder to misfire and resulting in acceleration shake. 2. Poor gasoline quality affects fuel injector atomization, leading to incomplete combustion in the cylinder and idle shake. It is recommended to use higher-octane gasoline after finishing the current tank and perform a fuel system cleaning. 3. The most common cause of shaking while driving is uneven tire tread surfaces on all four wheels, such as bulges or foreign objects.