Why does the car throttle jerky when it starts? What is the problem when the car shakes when it starts?

Experienced car owners must have encountered the problem of car shaking, such as when stepping on the accelerator or just starting the car. Although it does not affect driving, it is still necessary to eliminate the corresponding fault. So what is the reason?

Why does the car accelerator stop and start?

This is a sign of a missing cylinder in the engine, which means that at least one cylinder is not working properly. At the same time, there is a rumbling sound from the exhaust pipe when accelerating. Generally, the spark plug gap is too large or too small, the gap is as thick as a hacksaw blade, or the spark plug does not spark. It is also possible that the cylinder wire, ignition coil, or fuel injector is not spraying properly or the cylinder compression is too small.

What is the problem when the car starts shaking?

If the vehicle shakes violently when starting, it may be a problem with the clutch components. If it cannot engage smoothly, the body will shake. At this time, you should pay attention to check whether the clutch pressure plate, compression spring, and release lever are on the same plane.

If it just vibrates, the shock absorber of the engine support foot may be damaged. The engine speed fluctuation is not obvious.

If the vibration occurs when the engine speed drops significantly, it may be because the engine speed is too low when starting, or it may be due to insufficient power output of the engine. The vibration frequency is low and the amplitude is large.

What is the reason for the car shaking when starting?

The main reason why a car shakes during the starting phase is a problem with the clutch system. The more common reasons are that the clutch pressure plate spring force is uneven, which causes the clutch pressure plate to be uneven when engaged. The engagement surface of the pressure plate and the clutch plate cannot fully contact, resulting in shaking.

Another reason is that there is a problem with the clutch plate. When the clutch plate is uneven and deformed, or the clutch plate spring is damaged, starting jitter will occur. If you want to solve the problem, it is best to replace the clutch set, which can basically solve the problem.