What Causes Vehicle Body Shaking While Driving?
2 Answers
Here are the reasons for vehicle body shaking while driving: 1. Excessive carbon buildup on the fuel injectors and throttle body, or a dirty throttle body. During cold starts, carbon deposits inside the engine absorb some gasoline, resulting in an overly lean combustible mixture, making it difficult to start or causing engine shaking. 2. Tire-related issues, requiring inspection of tire pressure, tire wear, shock absorbers, and other components. It is best to perform a four-wheel alignment and dynamic balance. Additional information: The throttle body is a controllable valve that regulates air intake into the engine, available in traditional cable-operated and electronic throttle types. After entering the intake manifold, the air mixes with gasoline to form a combustible mixture for combustion and power generation. It connects to the air filter at the top and the engine block at the bottom, often referred to as the throat of the automotive engine.
I previously experienced body vibration while driving, mainly occurring at high speeds. Poor tire dynamic balance is the most common cause, such as when the balancing weights on the rims fall off or when newly replaced tires are not properly balanced. Warped brake rotors can also cause severe shaking when braking—I once encountered this after continuous braking on a mountain road. Issues with the tires themselves, such as uneven tire pressure, bulging tires, or out-of-round rims, can also be culprits. Additionally, problems with the suspension system should not be overlooked, as loose ball joints or leaking shock absorbers can make the car bumpy and unstable. It's advisable to first check the tire condition and dynamic balance data to avoid prolonged high-speed driving, which increases safety risks.
