What Causes Car Shaking When Accelerating at High Speed?
3 Answers
The reasons for car shaking when accelerating at high speed are: 1. Dirty throttle body; 2. Carbon buildup in fuel injectors, spark plugs, throttle body, or cylinders; 3. Faults in the engine, half shafts, fuel system, or ignition system; 4. Insufficient cylinder pressure; 5. Aging engine components; 6. Significant wheel alignment deviation. Solutions for car shaking when accelerating at high speed include: 1. Replacing oil filters, fuel filters, and air filters; 2. Cleaning carbon deposits from fuel injectors, spark plugs, throttle body, and cylinders; 3. Replacing various engine components. The correct method for pressing the accelerator is: 1. Place the right heel on the floor of the driver's compartment as a pivot point; 2. Gently press the accelerator pedal with the ball of the foot, using ankle joint movements to press or release; 3. Apply gentle force when releasing the accelerator pedal, ensuring smooth and gradual lifting.
I've worked in the auto shop for over a decade and often encounter car owners complaining about severe vehicle shaking when accelerating on highways. This is mostly due to ignition system issues, such as aging spark plugs or damaged ignition coils, causing unstable engine operation. Clogged fuel injectors are also common, where excessive carbon buildup leads to uneven power output. At high speeds with elevated RPMs, these problems become amplified, making the shaking more noticeable. If not repaired promptly, fuel consumption will increase, and the engine may suffer premature damage. It's recommended to regularly replace spark plugs, clean the throttle body, and preferably have a professional shop conduct inspections. Don't skimp on routine maintenance - spark plugs typically need replacement every few tens of thousands of kilometers. After replacement, acceleration becomes much smoother, and driving becomes safer.
Last time I was on the highway, the car vibrated badly when I stepped on the gas, which was quite unsettling. It turned out to be caused by unbalanced tires, possibly due to misaligned front wheels or deformed rims. At high speeds on the highway, such imbalances are more likely to be amplified. Uneven tire wear or incorrect tire pressure can also cause this, such as excessive wear on one side. If left unchecked for a long time, it can shorten tire life and increase fuel consumption. After returning home, I had a four-wheel alignment done and checked all the tires. Now the car runs much smoother. Remember, regular tire maintenance is important, and check the balance before hitting the highway. A simple self-check is to use a tire pressure gauge to measure the pressure—too much or too little air can easily cause vibrations.
