What are the causes of body shake and what causes car body shake

There are several reasons for engine shake:

1. The engine has serious carbon deposits, and the most common car with serious shake is that the fuel injector throttle valve is too dirty or too much carbon;

2. Ignition system problems, check the working conditions of spark plugs, high-voltage wires and ignition coils;

3. The oil pressure is unstable, if the first pressure of the pump is abnormal or the error and poor work of the inlet pressure sensor will cause the body to shake;

4. Aging of engine parts; Excessive carbon deposits in engine emissions absorb carbon from the gasoline of the cold-start injector, which leads to a dilute cold-start mixture and difficulty starting.

Severe idle vibration is generally caused by engine cylinder failure, aging or loose foot rubber, carbon deposits, fuel system failure, etc.

1.Serious engine carbon deposits: Cars always have the problem of carbon deposits, including cylinder carbon deposits, throttle carbon deposits, spark plug carbon deposits, intake carbon deposits, etc.

When the engine has too much carbon deposit, it will affect the ignition energy, air intake efficiency and air-fuel ratio of the car, resulting in the unstable power output of the car, and the phenomenon of idle speed and acceleration jitter appears.

2.Unstable oil pressure: If you have cleaned the engine carbon deposits, cleaned the throttle, replaced the oil gasket and spark plug, etc.

And when idling, you still find that the body shakes, it is recommended that you go to the 4S shop to check whether the oil supply pressure and intake pressure sensor are normal, if the oil pump supply pressure is abnormal, or the intake pressure sensor value is wrong, and the work is not good, it will cause the body to shake.

3.Engine cylinder shortage: Engine cylinder deficiency mainly refers to the engine one or more cylinders are not working properly, which is generally manifested as:

The exhaust fumes coming out of the car are obviously intermittent, and the exhaust pipe shakes violently, and the engine shake can be clearly felt, sometimes accompanied by abnormal noises. This is mostly related to ignition coil failure.

4.Aging of engine parts: Shake in the car is also associated with the aging of the engine feet (also known as claw pads).

The engine foot is actually the shock absorber system of the engine. The engine feet are responsible for absorbing slight vibrations when the engine is running. If there is a problem with the engine base, these vibrations can be transmitted to the steering wheel and cab, causing vibrations at idle.

Solution; The best way is to clean the oil circuit, clean it regularly, there is no specific experience in the research and development parameters of the clean engine from the new car, coupled with the continuous improvement of emission standards, can not adapt to the change of fuel, all manufacturers of the engine are unable to solve this jitter problem in the short term, plus the fuel quality is not very good or the initial fuel of the new car factory is stored for too long, resulting in a rapid increase in the colloidal composition of the oil circuit, which will continue to pollute the fresh fuel and cause no good fuel to participate in combustion in the later stage. The occurrence of excessive carbon deposits is especially common for China VI vehicles. We can only gradually alleviate most of the problems by maintaining clean oil circuits. The use of PNF dope fuel additives can solve the problems caused by carbon deposition.

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.

There are many reasons for car shaking, in addition to insufficient fuel combustion, it can also be caused by abnormal engine water temperature, low cylinder pressure, blocked fuel injectors, etc. If the car starts shaking, it is advisable to repair it in a timely manner.

First of all, car shake is divided into starting, idling, and high-speed driving. The start-up shake is mainly due to insufficient fuel combustion, resulting in insufficient power of the car. Low ignition energy.

When starting, especially when the fuel and lubricant temperatures are low, more oil is required to meet the power. For a long time, the spark plug gap gradually increased, resulting in a decrease in ignition energy and poor fuel atomization, resulting in body shaking. In addition, aging of the ignition coil, aging of the spark plug high-voltage wire, or leakage can also reduce the ignition energy.

Car idle jitter should not be ignored either. The causes of idle shake are serious carbon deposits in the engine, problems with the ignition system, unstable oil pressure, aging engine components, etc. In case of idle shake, it is recommended that the owner first clean the engine, replace the spark plugs, and check the fuel supply pressure of the vehicle.

The most common causes of high-speed shake are tires, such as high or low tire pressure, abnormal tire wear, rim deformation, shock absorber failure, tire dynamic balance, large deviation of wheel alignment data, etc. Of course, in addition to the most common tire problems, engine power can also cause the car to shake at high speeds.

In addition, car shake is also associated with aging of the engine feet, also known as claw pads. The engine foot is actually the shock absorber system of the engine. The engine feet are responsible for absorbing slight vibrations when the engine is running.

If there is a problem with the engine base, vibrations can be transmitted to the steering wheel and cab, causing vibrations at idle.

1. When the speed of the car is between 80 kilometers and 90 kilometers per hour, the steering wheel shakes and returns to normal when the speed exceeds 90 kilometers per hour. Most of this situation is caused by tire deformation or vehicle transmission system, and it is necessary to check whether the positioning angles of the front wheel and the toe meet the requirements, and if it is inaccurate, it should be adjusted; Set up the front axle to test the wheels, check the static balance of the wheels and whether the tires are too deformed, if the deformation should be replaced.

2. When the speed of the vehicle is 30 to 40 kilometers per hour, the body has a sense of shaking, such as the feeling of riding a boat. This situation is mostly caused by the deformation of the tire due to rubbing, collision or aging during daily use, and the tire can be replaced.

Idle shaking, the new car has been used for a period of time, and some owners will find that the body has some small shaking, but they don't know that there is a problem. "Body shake" is a sign that something is wrong with the car. Professionals tell us that body shaking may seem like a trivial matter.

Let me tell you, the electronic fan is activated! Normal phenomenon, if the shaking is violent, go to the 4S detection to replace the electronic fan for free, and the answer is complete.

Loosening caused by loosening of transmission system components can be caused by loose steering shaft assembly, too much steering wheel freedom, loose steering tie rod ball joint, or broken rubber sleeve. If the rotating mass of the steering wheel is unbalanced or the steering wheel hub bearing is loose, the dynamic balance should be corrected or the bearing replaced. Bulging tires and deformed rims.

If you notice a slight shake or deviation of the body while driving, it is usually caused by the tires.

A bulging or flat tire is likely to cause unstable tire pressure. You should measure the tire pressure on all four wheels for the first time. If you're not sure, you can do another four-wheel alignment and dynamic balancing.

If the vehicle does not deviate, the tire dynamic balancing can be carried out. This may be due to the deformation of the steel rim. The problem is more serious.

The owner needs to go to a professional repair shop for an inspection. This usually happens with vehicles that have a long lifespan. When replacing new tires and steel rims, it is necessary to keep the tires balanced, otherwise the steering wheel is easy to shake when the weight is uneven.

Body shake can affect driving comfort and handling judgment.

Air Intake System Failure: There are many things in the air intake system. Auto repair shop owners often talk about major components to be cleaned or replaced, such as throttles, air intakes, and air filters. In fact, unless your throttle is too dirty to see, it won't cause the vehicle to shake at all and there is something wrong with the air intake system.

Cleaning and replacing these parts is not a problem, and it is necessary to check which link is faulty.

Once the wheel dynamic balance is out of alignment, the wheels will run radially when the vehicle is moving. This runout will be transmitted to the steering wheel through the steering transmission mechanism, causing the steering wheel to wobble. There are many reasons for the misalignment of the wheel dynamic balance, including the falling off of the dynamic balance guide block, tire repair, over-repair of the steel rim, and a large amount of soil on the inside of the steel rim.

Secondly, if the speed of the vehicle is less than 60-80kmh, if there is a problem with the vehicle's positioning data, the steering wheel will shake. In the case of mechanical steering systems, the steering belt slips when it is too loose, which can also cause the steering wheel to shake. In addition, when the steering drivetrain is loose and the clearance is too large, the steering drivetrain will shake and make abnormal noise.

Many car owners often find that after driving for a long time, there will be all kinds of shaking. What is the reason for this? How to solve it?

I noticed that my body was shaking while driving.

If the body shakes or shifts slightly while driving, it is usually caused by the tires. First of all, it may be that the wheel balance is not good, and the owner needs to do the four-wheel alignment and dynamic balance as soon as possible. If the vehicle does not deviate, the tires are dynamically balanced.

The other situation is more serious, which may be caused by the deformation of the steel rim, and the owner needs to go to a professional repair shop for inspection. This usually happens with vehicles that have a long lifespan. Generally, when replacing new tires and new rims, it is necessary to balance the wheels, otherwise the steering wheel is easy to shake when the weight is uneven.

The body shakes will affect the driving comfort and handling judgment.

The third situation is caused by the unbalanced deformation of the propeller shaft, which generally occurs when multiple vehicles collide with the chassis.

The body shakes when idling.

Idle jitter is a common situation encountered by many car owners. If the owner starts or stops the vehicle without turning off the engine, if the body shakes significantly, it could mean that the vehicle has one of three things:

1.The oil pressure is unstable.

If the engine carbon deposits have been cleaned, the throttle valve has been cleaned, the oil pads and spark plugs have been replaced, etc. If the oil pump supply pressure is abnormal, or the value of the intake pressure sensor is wrong and working poorly, it will cause the body to shake.

Solution: Check the oil pressure and replace the parts if necessary.

2.Problems with the ignition system.

Check the operation of the spark plugs, high-voltage wires, and ignition coils. If the ignition system is not good to use, the spark plug does not jump, which will also lead to such a failure.

Solution: Check the spark plug for excessive carbon deposition and replace the spark plug.

3.The engine has a lot of carbon deposits.

The most common cause of car shake is that the throttle is too dirty or the injector has too much carbon. When there is too much carbon deposition inside the engine, the gasoline emitted by the cold start injector will be absorbed by a large amount of carbon deposit, resulting in too thin cold start mixture and difficult starting. In this case, it is easy to start the car only when the gasoline adsorbed with carbon deposits is saturated, and the gasoline adsorbed on the carbon deposits after starting the car will be sucked into the cylinder by the vacuum suction of the engine for combustion, so that the mixture becomes thicker and the engine combustible mixture becomes thinner and thicker, resulting in cold start.

The lower the temperature, the greater the amount of oil required for the cold start, and the more carbon will be deposited, which will affect the success of the cold start.

Solution: Clean the oil circuit, check whether there is carbon deposit in the idle motor, and clean it.

4.Aging of engine components.

Car jitter is also associated with the aging of the engine feet. The engine foot is actually the shock absorber system of the engine. The engine feet are responsible for absorbing slight vibrations when the engine is running.

If there is a problem with the engine base, these vibrations can be transmitted to the steering wheel and the driving roll compartment, causing vibrations at idle.

The above is about the causes and treatment methods of body shaking. You can learn from them and solve problems easily. Avoid breakdowns and troubles during driving.

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