The car shakes badly, what is the reason for the car shakes badly?

The car shakes badly, this is not a big problem, first the computer detection 1 check the sensors around the engine, the computer can detect the fault code 2, the computer can not detect carbon deposits;

3. According to experience, it is to clean the oil circuit, the fuel vehicle will accelerate powerlessly, and the fuel vehicle will accumulate carbon. You can use the amount of heat de, Si Youpu fuel additives, Wu Qilai, Chengxing Light fuel additives to clean, these are my personal test effective, can clean water and carbon deposits, the effect is good.

There are several possibilities for engine shake.

1."The air filter is dirty, clogged, and not replaced in time, or the high-voltage line is broken and affects the ignition and causes the engine to shake.

2.Engine shake caused by spark plugs not being replaced in time or low fuel pressure.

3.Dirty throttle valves, clogged injector capacities, or low cylinder pressure can cause engine shake.

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.

What is the problem with car jitter?

Indicates that the engine burns badly. It is necessary to start with combustion and three-way catalytic emissions, and if the three-way catalysis is not damaged, it can be passed by directly lifting the combustion.

There are 1 cleaning three-way catalysis 2Clean the oxygen sensor 3Directly improve fuel quality4To clean the oil circuit, use Add 5Find someone to check on behalf of 6High-efficiency and alkaline cleaners to clean the combustion chamber – not recommended and can damage the piston rings and oil seals.

To clean the oil circuit, the company has a general fuel additive cleaning two-way curing agent can prevent and remove carbon deposits in the oil circuit, prevent car shaking, and prevent abnormal automobile exhaust.

Severe car shaking can be caused by poor oil quality or carbon build-up in engine valves and intake ducts.

1. The volatility of inferior fuel is very poor, especially in winter, when the temperature is low and the cold car starts, the engine block temperature is low, and the fuel is difficult to atomize, resulting in the fuel injected into the cylinder can not be fully mixed with the air, resulting in difficulty in starting and the body shaking badly.

2. Because carbon deposition can absorb an appropriate amount of fuel, the judgment of the electronic control unit is wrong. The computer actually controls the injection of hypothetical 100 parts of oil and gas, but only 90 parts actually enter the cylinder (10 parts are absorbed by carbon deposits), so even if the remaining 90 parts of mixed oil and gas are fully burned, it will also not achieve the required power, thus causing the car to 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. 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.

There are generally four main causes of engine shake:

1. Ignition system problems.

If the ignition system of the car fails, it will cause the ignition system to work poorly, the spark plug flashing condition is not good, etc., which will lead to unstable faults such as movement of the car when idling.

It is recommended to check the working condition of the spark plug, high-voltage wire and ignition coil, whether there is any problem of excessive carbon accumulation in the spark plug, and if so, the spark plug should be cleaned or replaced immediately.

2. The foot glue is aging or loose.

The foot glue is the rubber block between the engine and the frame. Its function is to reduce the vibration and cushioning of the engine when working, and to fix the engine. Once these feet are aged or loose, the engine shakes dramatically.

It is recommended to replace the foot glue again, and the effect will be much weaker.

3. Carbon deposition.

When there is too much carbon deposition inside the engine, the ignition energy, intake efficiency, and mixture ratio of the car will be affected, resulting in the unstable power output of the car, and the phenomenon of jitter will occur at idle speed and acceleration. It is recommended to go to the 4S shop for the engine cleaning project.

4. The fuel quality is too poor.

Most of the domestic car owners have unstable faults such as "idling" jitter, which has a great relationship with the quality of fuel. Poor fuel quality can impair engine performance and cause idle jitter.

Solution: Clean the "throttle" of the car in time, which can basically eliminate various common faults. If it can't be solved, it can only be sent to the 4S shop for repair.

Look at how to shake, the general horizontal (left and right) shake should be a problem of dynamic balance or tires, adjust the tires, replace them if necessary, do the dynamic balance from the new, do it well, if you deviate from the 4-wheel alignment. In addition, the engine and transmission claw pads (also called brackets) should also be checked for aging and breakage.

If you start shaking at a certain speed, you can do a dynamic balancing.

Caused by insufficient vehicle power, engine failure, or spark plug failure.

After the compressor of the air conditioner is started, the pressure is too high, which causes the vehicle to vibrate, and the engine of the vehicle needs to be repaired or replaced in time.

The carbon deposition of the engine valve is serious, which makes it difficult to start the vehicle, and the load on the engine will increase, resulting in jitter, and the owner needs to clean the throttle valve in time.

If the spark plug inside the engine is damaged, the spark plug will be damaged by carbon deposit, or the spark plug will be poorly flashed, which will affect the normal operation of the engine, and the owner needs to clean or replace the spark plug in time.

The fan blades of the air conditioner fan are deformed, so when the air conditioner is working, the fan and the engine will resonate, and the owner needs to replace the damaged fan in time, so that the vehicle will not shake.

There are several main causes of engine shake:

1. The ignition angle is too advanced: In order to make the piston get power immediately after the end of the compression top dead center, it is usually ignited in advance before the piston reaches the top dead center, because it takes a while from ignition to complete combustion. Ignition too early will cause most of the oil and gas to burn when the piston is still compressing the stroke, and the unburned oil and gas will be subjected to great pressure and spontaneous combustion, causing the engine to shake.

2. Excessive carbon deposition in the engine: excessive carbon deposition in the combustion chamber of the engine will not only increase the compression ratio and produce high pressure, but also produce high temperature hot spots on the surface of the carbon deposition, which will make the engine shake.

3. The engine temperature is too high: The engine is too hot in an environment that makes the inlet temperature too high, or the engine cooling water is not well circulated, which will cause the engine to detonate and shake at high temperature.

4. Incorrect air-fuel ratio: Too thin fuel-air mixing ratio will increase the combustion temperature, and the increase in combustion temperature will cause the engine temperature to rise, of course, it is easy to shake.

5. The octane number of the fuel is too low: The octane number is the indicator of the anti-knocking of the fuel, the higher the octane number, the stronger the anti-detonation. Engines with high compression ratios have higher pressure in the combustion chamber, and are prone to knocking if fuel with low knock resistance is used.

There are generally two reasons why a car shakes badly:

1. Carbon deposition in the air intake system.

That is, there is a large amount of colloidal carbon deposits near the valve seat and around the idle motor, resulting in an over-concentrated and over-thin mixture. Idle jitter will be formed, which is more noticeable when the car is started cold.

2. The throttle is too dirty.

Due to the presence of colloidal deposits or excessive dirt around the throttle valve plates, the cross-sectional area of the air passage will change, making it impossible for the control unit to precisely control the idle air intake, resulting in an over-concentrated or over-thin mixture.

3. Ignition system problems.

Check the working condition of the spark plug, high-voltage wire and ignition coil, the ignition system is not working well, and the spark plug is not in good condition and the spark plug is not in good condition.

4. The oil pressure is unstable.

If you have cleaned the engine carbon deposit, washed the throttle, changed the oil cushion and spark plug, etc., and still found that the body shakes when idling, it is recommended to go to the 4S shop to check whether the fuel supply pressure and intake pressure sensor are normal. The solution is to check the oil pressure and replace the parts if necessary.

5. Aging of engine parts.

Car jitter is also associated with aging of the engine feet. The engine foot is actually the suspension system of the engine, and the engine foot is responsible for absorbing the subtle shake of the engine when it is running, and if there is a problem with the engine foot, these vibrations will be transmitted to the steering wheel and cab, causing shaking when idling.