What is the cause of car resonance jitter and what is the cause of car engine resonance jitter

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 deposit inside the engine, the gasoline sprayed by the fuel injector during cold start will be absorbed by the carbon deposit, resulting in a mixture that is too thin and making it difficult to start.

After landing, the gasoline adsorbed on the carbon deposits will be sucked into the cylinder by the engine and burned, which will thicken the mixture. 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 is to clean the carbon deposits at the throttle and 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.

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.

1. Too much carbon deposition in the throttle, fuel injector, and intake tract may be one of them, or it may be all. 2. When there is too much carbon deposition inside the engine, the gasoline sprayed by the cold start code Yudong fuel injector will be absorbed by a large amount of carbon deposition, resulting in the mixture of cold start being too thin and making the start shake. 3. Ignition coils, spark plugs, fuel injectors and other mechanical failures lead to lack of cylinders.

4. Low oil pressure or cylinder pressure, resulting in insufficient power, etc. 5. The fuel quality is unqualified. 6. The idle control valve is damaged or too dirty.

7. Air leakage from the intake manifold. 8. Damage to the engine arm or claw pad, etc. 9. The oxidation or grade of the engine oil is low, mainly due to poor low-temperature fluidity and insufficient cold start protection of the engine.

When the car shakes, it is recommended to go to a 4S shop or repair shop for inspection and maintenance to improve the safety performance of the car. Due to the excessive carbon accumulation of the fuel injector and the aging of the engine pad, it is necessary to go to the 4S store as soon as possible for the overall inspection and adjustment of the car.

Photo by Shi Lili of Pacific Automobile Network).

The reason may be that the idle speed of the engine has been set in the computer, and when the number of revolutions is low to a certain range, the on-board electric beam will automatically adjust it. If the idle speed is too low and vibrations occur, it is beyond the control of the computer. Workaround:

Check the idle valve, throttle, air flow meter, vacuum sensor and adjust the ignition time. The causes of engine resonance shake are as follows:1

Air filters are not clean: Air filters are designed to protect the engine and reduce wear. Generally, about 10,000 kilometers need to be replaced.

If the replacement is not timely, it will lead to insufficient air intake and low idle speed, resulting in engine vibration; 2.High-voltage line failure: The insulation, damage and aging of the high-voltage line will cause leakage and flashover of the high-voltage line, which will affect the normal ignition of the spark plug, and then cause problems such as insufficient power and violent shaking; 3.

The spark plug (burner) is used for too long: the life of the spark plug is long, and the ignition efficiency decreases significantly after more than 3-40,000 kilometers. At this time, it is easy to affect the normal operation of the engine.

The reasons for the resonance shake of the automobile engine are as follows: 1. The air filter is not cleaned: the air filter is designed to protect the engine and reduce wear, and it generally needs to be replaced at about 10,000 kilometers2. High-voltage line failure

The insulation, damage and aging of the high-voltage line will cause the leakage and flashover of the high-voltage line, which will affect the normal ignition of the spark plug, and then produce problems such as insufficient power and violent shaking3. The spark plug (nozzle) is used for too long: the spark plug has a lifespan, and the ignition efficiency is significantly reduced after more than 3-40,000 kilometers.

First of all, when idling, the body shakes and vibrates:

1.Excessive carbon deposits in the engine:

When the engine life is extended, when the car's throttle is too dirty or the fuel nozzle has too much carbon build-up, the engine shuddes and vibrates. When the engine is running, the fuel on the carbon deposits will be sucked into the cylinder by the engine, and the mixture will be uneven. When the car starts to get cold, the body shuddes and vibrates.

As a rule, during the use of the car, the throttle valve should be cleaned immediately.

2.Ignition system malfunction:

Problems with the ignition system are also one of the reasons why the car shakes. When there is a problem with the spark plug, high-voltage wire, or ignition coil in the ignition system, the starter car will also have a shaking. The small partner can judge the cause of the idle jitter of the car by detecting the spark plug.

3.The oil pressure is unstable:

When the oil supply pressure data of the car oil pump is not accurate, the car will also shake when idling. Check the oil pressure and if it needs to be replaced, it should be dealt with immediately to prevent further failure.

2. Shaking and vibration during driving:

1.The rim is not round:

In the process of using the car, when the car tires are strongly impacted, the rim of the car may appear unrounded, and it is more likely to appear unround during the use of tires, that is, the tires are a little deflated and quite big. It is difficult to return to the original shape of the rim when it is out of round, so it is important for friends to protect the rim of the car when driving.

2.Tire imbalance:

If the partner does not do the tire dynamic balancing when changing the new tires, when the car rotates at high speed, the car steering wheel may shake, and when the tire imbalance causes the car to shake, it can be solved by doing tire dynamic balancing.

3.Tire deformation:

If the tread is not normal or the tire has a clear bulge, it means that the tire is deformed, the tire is deformed, and there may be a trembling car in the use process.

Idle wobble when parked, usually low idling, or insufficient engine cylinders. The cylinder is not wanton, and the spark plug and high-voltage line need to be checked! In addition, this is easy to happen when the fuel injector and the cracked throttle valve are dirty!

Cleaning is required; The shaking when driving is also related to the chassis! There are games for the lever and rocker, and positioning the four wheels can be solved. Reasons for the severe bump of the car body:

1. Too much carbon; When the carbon in the engine cylinder is severe, the spark plug may become clogged and the valve may become clogged, causing the vehicle to shake when idling. If the car accelerates more than before and the shaking is very constant, consider an in-cylinder engine wash; 2. Failure of oil supply system; When the hydraulic pressure is unstable, the concentration of the gas mixture is easy to be unstable, not only shaking, but also unstable idling. First, consider replacing your gasoline filter.

Originally, if you use it for a long time, the filter may become clogged. Also, check the oil pressure that does not pass through the gasoline filter. If it's not normal, it may be a problem with the oil pump.

3. Engine pad aging; This is also a very common cause of shaking. If your car's engine is bumpy but the power doesn't wane, it could be a problem with the floor pads.

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.

The vast majority of car shake and vibration are basically caused by the following reasons: For example, there are problems with the spark plug, accelerator, and ignition coil of the car, which are most likely to affect the shaking and vibration of the car. When most cars find that they consume more fuel than usual, accompanied by unstable idling, weak acceleration, shaking and vibration, etc., you can start from the above three aspects.

Moreover, the carbon deposition of the car is quite serious, which is also the reason why it is easy to affect the shaking of the car. The inability to accelerate while driving with shaky vibrations means that carbon deposits are severe, and if the car's carbon deposits are not treated for a long time, they will consume engine oil, bring a bad driving experience, or cause damage to the engine. The abnormal water temperature of the car is also easy to cause the car to tremble and vibrate, because the engine of the car needs a normal degree of environment.

High water temperatures can lead to earlier ignition times, changes in the oil-air mixing ratio, thinner viscosity of engine oil, and poorer lubrication. Most of the fault causes are the lack of coolant, the thermostat cannot be opened, the fan does not rotate, and the temperature control switch is inaccurate caused by shaking and vibration.