11 Is the whole vehicle shaking when driving at high speed?

Fault Judgment: True Fault. Cause Analysis:

When the vehicle is driving normally to about 96km h, the whole car shakes the phenomenon, reduce the speed, the phenomenon disappears, and if the shake occurs again when accelerating to about 90km h, it means that the car chassis is faulty. The causes of the failure are: tire dynamic balance is inaccurate; Loosening of front and rear suspension, steering, transmission and other mechanisms; front wheel alignment, wheelbase misalignment; The half-shaft clearance is too large.

First of all, the misalignment of the tire will cause the wheels to jump while rolling, which is the main cause of the whole car shaking. Secondly, the suspension mechanism, steering mechanism, and transmission mechanism are loose and loose, resulting in the front toe value, the wheelbase of the car is inaccurate, and the leaf spring is too soft, which causes the vehicle to resonate in driving and induces the whole car to shake. Again, the half-shaft clearance is too large, so that the rear chemical in the driving irregular movement, wear and tear aggravated, resulting in the imbalance of the rotating mass, causing the whole car to shake.

If these faults are not eliminated in time, it will lead to a vicious circle and lead to other failures.

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Hello: The driving speed of the vehicle is lower than 100 and higher than 80, indicating that the tire dynamic balance is not good, if it is more than 80 and keeps shaking, it is a chassis failure, such as the deformation of the transmission shaft.

The reason for the shaking of the body at high speed: mainly because the fuel combustion is insufficient, resulting in insufficient power of the car; The other is tire problems, tire pressure is too high or too low, tire wear is abnormal, rim deformation, shock absorber failure, tire dynamic balance, wheel alignment data deviation is large, etc. In addition, engine power may also cause the car to shake at high speeds.

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Possible reasons why the car is shaking at high speed:

1. Tire problems: mainly due to abnormal tire pressure or serious tire wear.

Tire pressure too high or too low: Tire pressure differences between four tires are too large, which can cause the body to shake at high speeds. Examples:

Under normal circumstances, the front tire pressure is usually the same as the rear tire pressure is about the same. If the tire pressure of the right front wheel is and the pressure of the left rear tire is is, due to the difference in air pressure, the tire's ability to absorb energy and absorb shock is inconsistent, and the body shakes at high speeds.

Severe tire wear: Due to wheel alignment or rim deformation, the tire surface is worn inconsistently, resulting in body vibration during driving.

2. The car needs to do dynamic balance or four-wheel alignment, note: dynamic balance and four-wheel alignment are two different.

Dynamic balance: After tire repair, wheel rim deformation, abnormal tire wear, tire piercing big nails or entrainment of large stones, etc., will destroy the tire dynamic balance.

Four-wheel alignment: The wheel alignment data has a large deviation. In particular, the positioning angle of the front wheels is out of alignment, and the toe is too large. In this case, it feels that the vehicle is difficult to control when accelerating, and the shaking is generally not large, but it is awkward.

3. Problems with the engine.

Generally, it is caused by oil or ignition, and the vehicle is under high speed and high load, and the oil and ignition determine the power, and if one of the points is abnormal, it will cause the engine to shake weakly.

To sum up: it is recommended that the owner should go to the 4S shop or auto repair shop in time to let the car repair master test the vehicle and determine where the problem is, so as to repair the symptoms.

1.The surface of the brake disc is uneven, and the radial runout is large;

2.The deviation of wheel alignment data is large;

3.Tire pressure is too high or too low;

4.Abnormal tire wear;

5.deformation of the rim;

6.Failure of shock absorbers;

7.tire dynamic balance problems;

8.automatic transmission lock-up clutch problems;

Cause analysis: when the vehicle is driving normally to about 96km h, the whole vehicle shakes, reduces the speed, and the phenomenon disappears, and if the shake occurs again when accelerating to about 90km h, it means that the chassis of the car is faulty. The reasons for its failure are:

Tire dynamic balance is out of order; Front and rear suspension. Veer. loose transmission and other mechanisms; Front wheel alignment.

wheelbase misalignment; The half-shaft clearance is too large.

Solution: Timely pruning to remove the above faults of Huai Fan to avoid a vicious circle and cause other failures.

If the phenomenon disappears, if the lead is added to the speed to a certain speed, the shaking appears, indicating that the chassis of the car is faulty. The reasons for the failure are: the tire moving Huai hole is out of balance; Front and rear suspension. Veer. Transmission and other mechanisms flutter and move; Front wheel.

There are several reasons why the car trembles at high speed.

The front and rear suspension selling dates, steering rulers, transmission and other mechanisms are loose; front wheel alignment, wheelbase misalignment; The half-shaft clearance is too large. First of all, the misalignment of the tire will cause the wheels to jump while rolling, which is the main reason for the shaking of the whole car when the middle chain is disassembled.

When the vehicle is driving at high speed, the whole vehicle shakes the phenomenon, which may be caused by the tires. As the speed of the vehicle increases, the oscillation becomes stronger and stronger. Second, at a certain high speed, oscillation occurs, causing the steering wheel to shake.

You can first set up the drive axle, insert the safety plug on the front wheel, start the engine, and change to the high gear step by step, so that the drive wheel can reach the final oscillation speed. If the body and steering wheel shake at this time, it is caused by vibrations caused by the drivetrain. At this point, since the front wheels and front axle are at rest, if the final test oscillation speed is reached and the car does not shake, then the cause of the oscillation is a malfunction of the front axle of the car.

1.The stiffness of the front leaf springs is inconsistent, causing the steering wheel to shake at high speeds. At this time, the drive axle can be set up first, the safety plug is inserted on the front wheel, the engine is started, and the drive wheel is gradually hung to the high gear position, so that the drive wheel reaches the final oscillation speed.

If the body and steering wheel shake at this time, it is a swing caused by the drivetrain. If there is an intermittent lack of cylinders, it is easy to feel the power difference of a cylinder, especially when a cylinder is not ignited, there will be a significant back-and-forth regression.

2.If the tire pressure of the car is too high, the take-off degree of the car will be quite large when passing through the bumpy road, and it is easy to shake the body when driving at high speed, increasing the probability of being punctured. In most cases, the tire pressure of the car tires should be around the right, if the car does not have four-wheel alignment after the tire change, then the car will have shaking, vibration, increased fuel consumption, serious tire wear and other problems, and the car needs to redo the four-wheel alignment.

3.The initial check is the dynamic balance, and the front and rear must be done precisely, especially for classic cars. When the dynamic balance is slightly poor, the jitter may become smaller than a certain speed.

Check whether there is any noise when the four bearings vibrate. Self-priming identifying noise coming from ** can also help to identify problems. Replace the front bearings, replace the hubs on the inner and outer sides of the four tires, and then perform four-wheel alignment.

If the wheel hub of the car is deformed, the tire will also be deformed, so that the surface that the tire touches during driving will be uneven, and the body will shake when driving at high speeds. The above is the answer to the question of what may be the cause of the whole vehicle shaking phenomenon when the vehicle is driving at high speed.

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. So, when the electrical system, especially the air conditioner, is turned on, 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 to cause the throttle to close loosely or the idle motor to stagnate, resulting in the engine idling speed is too high, and the carbon deposits generated by the engine in this process will also cause the vehicle to shake, especially when starting the vehicle, 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 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.

It may be that the fuel burn of the car is not particularly sufficient during the driving process, and the speed of the vehicle can be reduced at this time, or it may be that the balance of the tires is not good, and the shock absorber has some failures. It is also related to the wear of the tires.

It could be a very serious mistake in the engine, or it could be an aging steering wheel, or it could be caused by the instability of the 4 wheels or the fact that the front wheels are plugged very quickly.

It may be that the tires are out of balance, the front and rear suspension, steering, the transmission is loose, the half-axle clearance is too large, and the axle distance is out of alignment.

Fault Judgment: True Fault.

Cause analysis: when the vehicle is driving normally to about 96km h, the whole car shakes the phenomenon, reduce the speed, the phenomenon disappears, and if the shake occurs again when accelerating to about 90km h, it means that the car chassis is faulty. The reasons for its failure are:

Tire dynamic balance is out of order; Front and rear suspension. Veer. loose transmission and other mechanisms; Front wheel alignment.

wheelbase misalignment; The half-shaft clearance is too large.

Solution: Eliminate the above faults in time to avoid a vicious circle and cause other faults.

Make a tire dynamic balancing. That's it.