What Causes Abnormal Engine Vibration While Driving?

[ODelaney]

There are many reasons for abnormal engine vibration while driving, such as damaged spark plugs, poor fuel quality, excessive carbon deposits, unstable oil pressure, etc. Below are the explanations for abnormal engine vibration: 1. Worn gaps between spark plugs can lead to insufficient spark plug ignition, resulting in incomplete combustion of the air-fuel mixture, which causes the car to vibrate during acceleration. Additionally, if the ceramic part of the spark plug is cracked, the spark plug may fail to ignite, causing one cylinder to stop working and leading to acceleration vibration. In such cases, the spark plugs should be replaced. 2. Poor fuel quality can affect the atomization effect of the fuel injectors, leading to incomplete combustion of the air-fuel mixture in the cylinders and resulting in engine vibration and lack of power. It is recommended to use higher-grade gasoline after finishing the current tank and perform a fuel system cleaning. 3. Excessive dirt on the throttle body or carbon buildup on the fuel injectors can cause the throttle to not close properly or the idle speed control motor to get stuck, leading to excessively high idle speed. Carbon deposits generated during engine operation can also cause vehicle vibration, especially when starting the car—the engine may vibrate more intensely than usual or even fail to start on the first attempt. Therefore, when the vehicle experiences vibration, the throttle body and fuel injectors should be checked first. If excessive dirt or carbon buildup is found, they should be cleaned promptly.

[LaValerie]

I remember that time when my car was shaking while driving. It suddenly started shaking violently when I accelerated on the highway, and the steering wheel was vibrating so much it made my hands numb. I immediately pulled over to check, and the mechanic later told me it was caused by worn-out spark plugs. The spark plugs hadn’t been replaced for years, causing intermittent ignition and resulting in the shaking. Another possible cause could be excessive carbon buildup clogging the fuel injectors—if not cleaned regularly, this can easily lead to issues. If the engine mounts are loose, the car can also shake. These mounts are made of rubber and can crack or deteriorate over time. I must remind you that engine shaking is no small matter—it affects acceleration performance, increases fuel consumption, and could even lead to loss of control on the highway. It’s best to first check the condition of the spark plugs or try a simple cleaning, but getting a professional inspection is the safest bet. That’s how I avoided bigger trouble. Don’t ignore small issues while driving—regular maintenance is really crucial.

[EvaDella]

I enjoy modifying my beloved car and have encountered shaking issues while driving a few times. Last time, when accelerating on the road, it suddenly started jerking, feeling like an earthquake. After analysis, it might be due to a burnt ignition coil or unstable fuel pump pressure causing poor fuel injection. It could also be because the air filter was dirty and blocked the intake, leading to abnormal combustion of the air-fuel mixture and resulting in shaking. After replacing the spark plugs, the situation improved significantly—it's a simple DIY job. If the shaking is severe, don’t forget to check the tire balance, as imbalance can also transmit vibrations to the engine. I suggest first troubleshooting basic components, such as using an OBD tool to read fault codes, which can quickly pinpoint the issue. Ignoring such problems not only damages the engine but also affects the driving experience. Address them promptly—my experience is that small issues shouldn’t be allowed to escalate into major ones.

[GavinLynn]

I've been driving for most of my life, and the common causes of engine shaking are damaged engine mounts or uneven cylinder compression. These parts naturally develop problems with prolonged use, such as aging rubber mounts losing their damping effect and causing vibration. Insufficient compression might indicate poor piston sealing, which requires inspection by a professional mechanic. I remember once on a long trip when I experienced shaking, I went straight for a checkup—it nearly caused an accident. Safety first! If you notice any shaking, stop and inspect immediately; don't wait for an accident to regret it. Pay attention to engine sounds regularly, and frequent maintenance for older cars can prevent issues.