The reason why the car starts to shake, the reason why the car starts to shake

1. The clutch is shaking.

Let the engine idle, put on low gear, slowly release the clutch pedal and increase the throttle to start, if the body shakes at this time, it means that the clutch is shaken.

2. The positive pressure distribution between the main and slave discs is uneven.

Often the engagement clutch compression spring elastic force is uneven, the separation lever adjustment is inconsistent and or the diaphragm spring separation finger end is uneven, which will lead to the compression of the sequence time is not synchronized, the pressure plate is uneven, and even the pressure plate is skewed, resulting in poor contact between the main and driven discs, resulting in the shaking of the clutch. Beimai auto parts network experts said that at this time, the clutch compression spring should be replaced and the release lever should be leveled.

3. The elastic force of the damping spring becomes weaker.

Beimai auto parts network experts said that the elastic force of the clutch torsional damping spring becomes weaker, the elastic force of the clutch compression spring becomes weaker, and the diaphragm spring cracks will cause the clutch to tremble when engaged. The strategy that should be adopted at this point is to replace the springs.

4. Poor contact of clutch lining.

The clutch lining is not in good contact, and the surface is hardened or glued to it, which can easily cause the clutch to tremble. At this time, the clutch lining should be re-connected.

5. Warping, skewing and deformation of the driven disc.

When the disc is warped, skewed and deformed, the clutch lining will make irregular contact during the clutch engagement process, and the pressure cannot increase smoothly. At this point, the driven disc should be calibrated or replaced.

6. The engine has serious carbon deposits.

The most common cause of car shake is that the throttle is too dirty or the fuel injector has too much carbon. When the carbon deposition inside the engine is excessive, the gasoline sprayed by the cold start fuel injector will be absorbed by the carbon deposition in large quantities, resulting in the mixture of cold start being too thin, making it difficult to start, in this case, only when the gasoline absorbed by carbon deposition is saturated, it is easy to get on the car, and the gasoline adsorbed on the carbon deposition after the car will be sucked into the cylinder by the vacuum suction of the engine for combustion, and the mixture becomes thick, and the combustible mixture of the engine is dilute and thick, causing idle shaking after cold start. The lower the temperature, the greater the amount of oil required for the cold start, and the more carbon deposits will affect the smooth cold start.

The first one**The one below is Valeo's**,The top is luk,Valeo used a few months to shake it.,Finally, I changed it again with the mentality of trying it out.,I didn't think it was really a clutch problem.,Even the flywheel was changed before.。

Reasons for the shaking of the car start: 1. The throttle is too dirty or the fuel injector has too much carbon deposit, when the carbon deposit inside the engine is too much, the gasoline sprayed by the cold start fuel injector head will be absorbed by the carbon deposit, resulting in the cold start mixture is too thin, making it difficult to start, in this case, only when the gasoline absorbed by the carbon deposit is saturated, it is easy to get on the car, and the gasoline adsorbed on the carbon deposit will be sucked into the cylinder by the vacuum suction of the engine after the car is burned, and the mixture becomes thick, and the combustible mixing of the engine is dilute and thick. Causes idle jitter after cold start; 2. The positive pressure distribution between the main and driven discs is uneven, and the elastic force of the compression spring of the often engaged clutch is uneven, and the adjustment of the separation lever is inconsistent and the finger end of the diaphragm spring separation is uneven, which will lead to the unsynchronized time of compression, the uneven force of the pressure plate, and even the skewed pressure plate, resulting in poor contact between the main and Duan Chengchun driven discs, resulting in the shaking of the separation and simple adapter. At this time, the clutch compression spring should be replaced and the release lever should be leveled; 3. The elastic force of the damping spring becomes weaker, the elastic force of the clutch torsion damping spring becomes weaker, the elastic force of the clutch compression spring becomes weaker, and the cracks of the diaphragm spring will cause the clutch to tremble when engaged.

The strategy that should be adopted at this point is to replace the springs.

Analysis of the causes of car shake:

1. Suspension system problems.

Body shake is also related to the aging of the suspension system. It is mainly responsible for filtering out the shake of the engine when it is running, and if there is a problem with the suspension, these vibrations will be transmitted directly to the steering wheel and cab, affecting the driving. When the engine is idling, it is easy to cause shaking when the electrical system in the car is turned on.

The engine will increase the load when the electrical appliances are turned on, causing the idle speed to drop, and to compensate for the jitter caused by the idle slip, the engine will automatically increase the speed by partially. Therefore, when the electrical system is turned on, especially when the orange is rotten, the engine will often shake. This jitter is likely to be caused by the aging of the shock absorber and needs to be replaced in time.

2. Tire problems.

For tires, the tire must be balanced once when the car is replaced with new tires and new steel rims, otherwise the steering wheel will be prone to shake when the counterweight is uneven. If you find that the tire weight is not equal, you need to add lead to the inside of the rim to average the weight of the tires on both sides. Whether it is a general steel ring or a lightweight aluminum ring, it may deform or crack when subjected to a certain external force.

Deformation of the rim can cause shaking when driving, uneven weight of the rim can also cause shaking when driving, and incorrect angle of the rim can also cause shaking when driving.

3. Throttle problems.

The most common cause of car shake may be a dirty throttle valve and excessive carbon build-up in the fuel injector. After the car travels for a period of kilometers, the throttle valve will be too dirty and the throttle will not close tightly or the idle motor will be stuck, resulting in the engine idle speed is too high, and the carbon deposits generated by the engine in the process will also cause the vehicle to shake, especially when starting the car, the engine will shake more than normal, and even sometimes there will be a phenomenon that can not be started at one time. Therefore, when the body shakes, the first thing to do is to check the throttle and fuel injectors.

If you find that the throttle valve is too dirty or the fuel injector has too much carbon deposit, you should clean it with fuel injector cleaner or Yuanwei throttle cleaner in time.

4. The oil pressure is unstable.

If you still find that the body shakes after these are finished, it is recommended that you go to the repair shop to check whether the fuel supply pressure and intake pressure sensor are normal, if the oil pump supply pressure is not normal, the intake pressure sensor is wrong and improper work will cause the body to shake.

The reason for the shaking of the vehicle start, which is due to the irregular wear of the clutch, caused by the deviation, in the process of engagement, the clutch plate can not be smoothly engaged, but a little engagement, a little and loose, so that the engine power just began to transmit, and suddenly skidding, the performance of the vehicle is similar to the feeling of jumping. The reason for the shaking of the vehicle start, which is due to the irregular wear of the clutch, caused by the deviation, in the process of engagement, the clutch plate can not be smoothly engaged, but a little engagement, a little and loose, so that the engine power just began to transmit, and suddenly skidding, the performance of the vehicle is similar to the feeling of jumping. Problems that cause starting jitter, such as poor oil circuit, and oil can't keep up when the throttle is low, causing the engine cylinders to work unevenly and shake.

Or the throttle is too dirty, the air intake is not smooth, and the work is uneven, resulting in shaking. There are also high-voltage line breakage and burning, or spark plug breakdown, cylinder does not work, engine operation is not smooth and shaking, etc. It is recommended to check the ignition system first, remove the ignition coil to check whether the contacts are rusty, whether the screws are tightened, if the conductivity is rusty, the ignition often fails, and the ECU is used to correct the frequency, and the engine does not shake.

The spark plugs are replaced on time, and the kilometers are different for different materials. It is also possible that the engine air intake air filter is too dirty, the sponge gap becomes smaller, and it must be difficult to take in, by the way, check whether the throttle is normal, that thing is the accelerator pedal to control the opening and closing, if it is too dirty to open and close smoothly, the engine must also shake. If the above steps do not solve the problem, it is recommended to check whether the oil pump and oil supply line are normal.

If it doesn't work, you have to dismantle the engine and scrape the carbon, and the general problem can be solved.