What are the causes of car body shaking?

Analysis of the causes of car shake:

1. Cold start jitter.

First of all, starting from the cold start, the main reason for the cold start body shaking is that the fuel combustion is insufficient, resulting in insufficient power of the car. The ignition energy is low, and when starting, especially when the temperature of the fuel and lubricating oil is low, more oil is required to meet the power. Over time, the pole gap of the spark plug gradually increases, resulting in a decrease in ignition energy and poor fuel atomization, which leads to the shaking of the body.

In addition, the ignition energy can also be reduced due to the aging of the ignition coil, the aging of the high-voltage wire of the spark plug, or the leakage of electricity.

2. 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.

3. 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.

4. 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.

5. 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 main cause of idle jitter;

1. The most common cause of car shaking is that the throttle valve is too dirty or the fuel injector has too much carbon.

2. When the carbon deposition inside the engine is too much, the gasoline sprayed by the cold start fuel injector will be absorbed by a large amount of carbon deposition, 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 started, 3. After the car is adsorbed, the gasoline adsorbed on the carbon deposition 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, resulting in 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.

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, and use PNF fuel additives to solve the above problems caused by carbon deposits. The fuel quality is not very good or the initial fuel of the new car 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, and the carbon deposition exceeds the standard, which is especially common for China VI vehicles. We can only gradually alleviate most of the problems by maintaining clean oil circuits.

Causes of car body shaking and how to fix it:

1. The engine has serious carbon deposits.

The most common cause of car shake is that the throttle valve is too dirty or the fuel injector has too much carbon, because the gasoline adsorbed on the carbon deposit after the car is sucked into the cylinder by the engine for combustion, and the combustible mixture of the engine is sometimes dilute and sometimes thick, resulting in idle shaking after cold start.

Solution: Clean the oil circuit and check whether the idle motor has carbon deposits on the limbs and should be cleaned.

2. Ignition system problems.

One of the causes of jitter is poor working of spark plugs, high-voltage wires, and ignition coils.

Solution: Check whether the spark plug has too much carbon deposit, and replace the spark plug in the fire opening section.

3. The oil pressure is unstable.

Abnormal oil supply pressure of the oil pump or incorrect value of the air pressure sensor and poor operation will cause the body to shake.

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

4. Aging of engine parts.

Car shake is also related to the aging of engine parts, and if there is a problem with the engine parts, these vibrations can be transmitted to the steering wheel and cab, causing shaking when idling.

Solution: Replace car parts.

When there is an abnormal situation in the car, it generally means that there is something wrong with the internal structure of the car. Therefore, when there is an abnormal situation in the car, we must find a solution as soon as possible to reduce the occurrence of accidents.

Possible reasons for the shaking of the body of the car while driving:

If there is a slight shaking or deviation of the body during driving, it is generally a fault caused by the tire lead. First of all, it may be that the tire balance is not good, and the owner needs to do a four-wheel alignment as soon as possible.

The other condition is more serious, which may be caused by the deformation of the steel rim, which requires the owner to go to a professional repair shop for inspection, which generally occurs in vehicles with a long service life. Generally, when the car is replaced with new tires and new steel rims, it is necessary to do a tire balance, otherwise the steering wheel will be prone to shake when the counterweight is uneven. Body shake will have an impact on driving comfort and handling judgment.

The third situation is caused by the deformation of the transmission shaft and the imbalance, which generally occurs in the ground collision of more cars.

Many car owners will encounter such a problem: "after a long time of driving, the body will keep shaking". The body shakes is a warning that the car wants you to make.

There is a problem with the car and it should be dealt with promptly. Now, let me tell you, what's wrong with the car when the body shakes? How to solve it?

1. Aging of engine parts.

Car shake is also associated with the aging of engine components. At this point, if there is a problem with the engine parts, these vibrations can be transmitted to the steering wheel and cab, causing idle jitter.

Solution: Replace car parts.

Second, the engine has serious carbon deposits.

The most common cause of car shake is that the throttle is too dirty or the injector has too much carbon, because the gasoline adsorbed on the carbon deposit is sucked into the cylinder by the engine for combustion, and the combustible mixture of the engine is sometimes thin and sometimes abundant, causing idle shake after cold start.

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

Three. The oil pressure is unstable.

Abnormal oil pump supply pressure or incorrect intake pressure sensor value and poor operation can cause body shaking.

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

Four. Ignition system issues.

One of the causes of jitter is that the spark plugs, high-profile crimps, and ignition coils are not working properly.

Solution: Check the spark plug for excessive carbon deposition and replace the spark plug. I have given you all the trembling bodies of the Harasaki Volin and the solution.

Hope it helps you, so that you don't panic excessively when you encounter this kind of problem. At the same time, car owners should regularly inspect and maintain their vehicles to avoid the embarrassment of Hokuan knowing when something is wrong.

Vehicle shake can be divided into starting, idling, and high-speed driving. The jitter at start is mainly due to insufficient fuel burning, resulting in insufficient power in the vehicle. Low ignition energy.

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

There are many reasons why cold and hot start vehicles can shake. In addition to the above-mentioned insufficient fuel combustion, it may also be due to abnormal engine water temperature, low cylinder pressure, blocked fuel injector, etc., if the vehicle is shaking, it is recommended that the owner go to the 4S shop for maintenance in time. Vehicle idle jitter should not be ignored.

The causes of idle jitter include severe engine carbon deposits, ignition system failure, unstable oil pressure, aging engine components, etc. If the idle speed shakes, the owner is advised to clean the engine, replace the spark plugs, check the oil supply pressure, etc.

The most common causes of high-speed shake are tires, such as excessive or low tire pressure, abnormal tire wear, rim deformation, shock absorber failure, tire dynamic balance, excessive 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.

Starting from a cold start, the main cause of cold start body shaking is insufficient fuel burn, resulting in insufficient vehicle power. Low ignition energy. When start-up, especially when fuel and lubricant temperatures are low, more oil is required to meet power requirements.

For a long time, the pole gap of the spark plug gradually increased, resulting in a decrease in ignition energy and poor fuel atomization, which led to the body shaking. In addition, aging of the ignition coil, aging or leakage of the spark plug high-voltage wire can also reduce the ignition energy. Body jitter is also related to the aging of the shock absorber system.

It is mainly responsible for filtering vibrations during engine operation. If there is a problem with the shock absorber, these vibrations will be transmitted directly to the steering wheel and cab, affecting the driving.

Because the car is too fast in the process of driving, it may also be because of a problem with the car's engine, or there may be a problem with the suspension of the car, all of which will cause the car to shake.

It is likely that the speed and gear of the car do not match, or because the car revs too high, or because the engine is abnormal.

It is likely that there is a carbon deposit in the air intake system, it may also be because the throttle is dirty, it may be because the speed is relatively fast when driving, or it may be because the spark plug is not replaced in time.

It should be carbon deposits, it may be that the valve is too dirty, and it may be that the engine is faulty, try to overhaul it

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.