What Causes Engine Shaking When Accelerating?

[LeLyla]

Here are the reasons for engine shaking during acceleration: 1. The most common issue when experiencing 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 causing shaking during acceleration. Additionally, cracks in the ceramic part of the spark plug can prevent sparking, causing one cylinder to misfire and resulting in acceleration shake. 2. Poor fuel quality can lead to inadequate atomization by the fuel injectors, causing incomplete combustion of the air-fuel mixture in the cylinders, which may also result in idle shaking. It is recommended to use higher-grade gasoline after consuming the current tank and perform a fuel system cleaning. 3. The most common cause of shaking while driving is uneven tire tread on the four wheels, such as bulges or foreign objects. Additionally, loose wheel bearings can also cause vehicle shaking during driving.

[VanAaliyah]

Recently, when I stepped on the gas pedal, the engine shook quite violently, which made me a bit nervous. After getting it checked, I found out it was a minor issue. Carbon buildup or aging spark plugs can cause unstable ignition, making the engine shake when accelerating; clogged fuel injectors can lead to uneven fuel spray, causing the engine to tremble; and a dirty air filter can affect air intake, resulting in poor combustion of the air-fuel mixture, which also causes shaking. Based on my experience with old cars, these are the most common causes. I suggest you visit a repair shop as soon as possible—don’t delay like I did, which led to a sharp increase in fuel consumption and costly repairs later. Remember, regular maintenance of spark plugs and filters can prevent most of these issues, saving you money and hassle.

[DelMiranda]

With over 20 years of driving experience, I can say that throttle vibration usually indicates combustion issues. Worn spark plugs causing misfires are the most common culprit; clogged fuel injectors leading to uneven fuel supply can also make the engine shake. It's also important to check if ignition coils are failing - losing one cylinder will cause noticeable vibration. Deteriorated engine mounts reducing cushioning effect can be another reason. Though sometimes subtle, this vibration carries hidden risks: sudden intensification during high-speed driving may lead to loss of control. Early inspection of easily replaceable parts like spark plugs and coils is crucial. I always keep an OBD scanner for preliminary checks, but professional diagnosis is more reliable to rule out other potential faults.

[SanKing]

Engine shaking is not just annoying, it actually endangers driving safety. Shaking during acceleration may be caused by unstable fuel pump pressure or air intake system leaks leading to abnormal combustion; spark plug carbon buildup and misfiring are also common. I believe immediate action is necessary: shaking at high speeds can easily lead to imbalance or even stalling accidents. Check basic components like spark plugs and fuel injectors, or visit a repair shop—don't risk major problems by saving small costs. Safety comes first, take timely action to protect yourself and your vehicle.