What is the cause of the shaking of the car when driving at a constant speed

The main reason for the failure is the increase in carbon deposits in the throttle, intake duct, valve and other parts, which adsorbs some gasoline when the car is cool, and when the car is hot, these gasoline volatilize, and the mixture will be too thick when the engine is idling, resulting in unstable idle of the hot car.

Therefore, you should not only check the throttle valve and idle motor, etc., but also check whether there is too much carbon and dirt in the intake tract, if there is too much, it will cause the cross-sectional area of the air channel to change, so that the control unit can not accurately control the amount of idle air intake, resulting in too thick or too thin mixture, so that the combustion is abnormal and causes the engine to shake. At the same time, it is also necessary to check whether the canister is faulty.

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.

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.

If it is on a flat road, the dynamic balance of the tire is not right, or the tire is deformed and bulging, and the wheel drum is deformed.

The hem arm sleeve is broken, or the ball head.

Why does the engine shake during driving? The mechanic told the truth and hurried to inspect and repair.

Causing the car to shake during driving, there may be.

du for the following reasons: zhi

The throttle is too dirty, and the fuel injection dao

Mouth accumulation carbon. Engine floor pads are aging.

Right. Uneven tire weighting, including wheel hub out-of-round, wheel hub imbalance, drive shaft imbalance, etc.

Extended Materials. Carbon deposits in the engine are the most common cause of car shake, and the most common of all the carbon deposits is dirty throttle valves or excessive carbon deposits in fuel injectors.

Therefore, when the vehicle is shaken, the throttle and fuel injector should be checked first. If you find that the throttle is too dirty or the fuel injector has too much carbon deposit, you should clean it with fuel injector cleaner and throttle cleaner in time.

What should I do if the car shakes while driving? Let's find out!

During the driving of the car, the jitter may be that the speed is too high, and the speed of the car is not keeping up, there may be other reasons for asking, generally it is a problem with the engine, you can go to the repair shop to check it.

What happens when the car shakes normally?

The body shakes during driving, which can mean that the vehicle has one of the following four situations:

2. The oil pressure is unstable. If you've cleaned the carbon deposits in the engine, cleaned the throttle valves, replaced the oil pads and spark plugs, and still notice that the body shakes when idling, it is recommended to check that the fuel supply pressure and intake pressure sensors are normal. Normal in 4S shop.

If the fuel pump supply pressure intake pressure sensor value is abnormal or incorrect, poor operation will cause the body to shake. Solution: Check the oil pressure and replace the parts if necessary.

3. Aging of engine parts. Car shake is also associated with the aging of the engine feet. The engine feet are actually the shock absorption system of the engine.

The engine feet are responsible for absorbing the slight shake of the engine when it is running. If there is a problem with the engine feet, these vibrations can be transmitted to the steering wheel and cab, causing idle jitter.

Extended information: 1. The oil pressure is unstable. If you have cleaned up the engine carbon deposits, cleaned the throttle valves, replaced the oil pads and spark plugs, etc., and still find that the body shakes when idling, it is recommended to check the fuel supply pressure and intake pressure sensors at the 4S shop. If the fuel pump supply pressure is abnormal or the value is incorrect, the intake pressure sensor will not work well and cause the body to shake.

2. Engine parts may be aging, such as engine foot aging, which may lead to body shaking. The engine feet are actually the shock absorption system of the engine. The engine feet are responsible for absorbing the slight shake of the engine while it is running.

If there is a problem with the engine feet, these vibrations are transmitted to the steering wheel and cab.

If there is a slight shaking of the body during driving, it is generally a tire failure, you can check the tires and do a dynamic balance test.

It is very likely that there is some problem with the engine, and it may be that the engine has too much carbon deposit.

It may be due to damage to the spark plug, insufficient combustion of the mixture, insufficient ignition of the spark plug, wear of the spark plug at several points, and increased low carbon of the throttle.

If there is a problem with the parts of the car, you should drive the car to the after-sales service store and let a professional master repair your car.

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 many reasons for jitter while driving. For example, the engine pad is damaged and failed, the transmission pad is damaged and failed, the rim is not round, the tire is not round, the shock absorber top rubber is damaged and failed, and the shock absorber is damaged.

There are many reasons why a car can shake while driving, but the biggest possibility is that there is a problem with the tires and shock absorbers.

And if the rim and tires are not round, it will cause tremors and vibrations when driving. The only solution is to replace the rims and tires. The aluminum alloy rim is not round, has poor ductility, and cannot be repaired. If the iron rim is slightly not round, it can be repaired.

The connection between the shock absorber and the body basically has a top glue to play the role of cushioning. Because it is a rubber product, it will age and harden over time. After the top glue ages and hardens, the car will shake even more. The solution is to replace the top rubber of the shock absorber.

Damage to the shock absorber can also affect the vibration of the car while driving. After long-term use, the shock absorber will have problems such as oil leakage, which will lead to the decline of the shock absorber performance and affect the vibration of the car when driving. The solution is to replace the shock absorbers. If there is a problem with the shock absorber springs, they should be replaced together.

When there is a problem with the floor pads of the engine and transmission, the trembling vibrations generated when the engine and transmission are working are transmitted to the body. So it affects the tremor and vibration of the car. The solution is to replace the machine pad.

Dear friends, that's all for today's brief introduction to the car series, so after reading it, will you shake the car when driving? Do you understand this problem? These methods are some of my own experiences and I hope they will be enlightening and helpful to you.

Try your balance and check the toe-in and camber of the front wheels! Four-wheel alignment should not be done easily, the original four-wheel alignment parameters are the most accurate, and it will be counterproductive if you don't do it well! Hope mine will be helpful to you!

The reasons for the shake of the car in the gearbox during driving may be:

1.Serious carbon deposits in the engine: The most common cause of shake in the car is an unclean throttle or too much carbon in the injector.

When the engine has too much carbon deposit, the gasoline sprayed by the cold start injector will be absorbed by a large amount of carbon deposit, resulting in too thin mixture during cold start and difficult to start. In this case, it is easy to start the car only when the gasoline that adsorbs carbon deposits is saturated. After the car starts, the gasoline adsorbed on the carbon deposit will be sucked into the cylinder by the vacuum suction of the engine for combustion, which thickens the mixture, and the combustible mixture of the engine becomes thinner and thinner, resulting in a cold start.

2.Aging of engine components: Rolling shake is also related to the aging of engine feet.

The engine foot is actually the shock absorption 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.

3.Ignition system problems: Check the working condition of spark plugs, high-voltage wires, ignition coils. Poor ignition systems and poor ignition of spark plugs can also cause such failures.

There are many reasons for car jitter, it can be too much carbon accumulation on the throttle, aging engine floor pads, or it can be a lack of cylinders in the engine. The lack of cylinder is caused by a faulty ignition system. The main components of the ignition system include the ignition coil and the spark plug.

Causes of idle jitter:

1. The engine has serious carbon deposits. The most common cause of idle judder is excessive carbon build-up on the throttle or injector. When there is too much carbon deposition inside the engine, the gasoline sprayed by the fuel injector during cold start will be absorbed by a large amount of carbon deposition, resulting in too thin mixture, making it difficult to start.

After the car is hit, the gasoline adsorbed on the carbon deposits will be sucked into the cylinder by the engine for combustion, which will make the mixture thicker. The mixture is sometimes dilute and sometimes thick, which will cause idle jitter after cold start. The lower the temperature, the greater the amount of oil required for cold starts, and the more the presence of carbon deposits affects cold starts.

The solution to the problem is to clean the carbon deposits at the throttle and fuel injector.

2. Poor ignition system and poor ignition of spark plugs will also lead to engine idling and shaking. If there is a problem, check if the ignition system is faulty and if there is too much carbon deposited in the spark plug.

3. The oil pressure is unstable. If you have cleaned the engine carbon deposits, cleaned the throttle valve or replaced the spark plug, and there is still the problem of body shaking when idling, it is recommended to go to the 4S shop to check whether the fuel supply pressure and intake pressure sensor are normal. If the oil pump supply pressure is not normal or the intake pressure sensor is incorrect, it can also cause the body to shake when idling.

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.