What Causes Shaking During Acceleration from 80 to 100 km/h When Pressing the Accelerator?
2 Answers
Shaking during acceleration from 80 to 100 km/h when pressing the accelerator is caused by damaged spark plugs or poor fuel quality. Damaged spark plugs: The most common issue causing shaking during acceleration is damaged spark plugs. Wear of the spark plug electrode gap leads to insufficient sparking, resulting in incomplete combustion of the air-fuel mixture and shaking during acceleration. Additionally, cracks in the ceramic part of the spark plug can prevent it from sparking, causing one cylinder to stop working, which also leads to shaking during acceleration. Poor fuel quality: Poor fuel quality affects the atomization effect of the fuel injectors, leading to incomplete combustion of the air-fuel mixture in the cylinder, which can also cause idle shaking. It is recommended to use higher-grade gasoline after finishing the current tank and perform a fuel system cleaning.
I remember my car also shakes when accelerating to 80-100 km/h, and it's more noticeable when pressing the throttle. This is usually a problem with the drivetrain or engine. The most common causes are unbalanced or underinflated tires: if you haven't had a wheel balance done recently, a warped axle can cause high-speed vibrations. Additionally, the ignition system might be faulty, such as worn spark plugs or leaking high-voltage wires, making the engine run unevenly; I checked my car's spark plugs and replaced them when I found the gap was too large. The fuel system shouldn't be overlooked either—clogged fuel injectors or a dirty fuel filter can cause uneven fuel supply, worsening the shaking during acceleration. From a safety perspective, ignoring this issue is dangerous at high speeds and can lead to loss of control. It's advisable to visit a repair shop as soon as possible for professional diagnostics. They'll start with the simplest checks, like tire pressure and wheel balancing. Regular maintenance can help prevent such issues.
