When the car is raining, it shakes and idles unsteadily, like a lack of cylinders

1. Direct causesIt refers to the dirty, worn, incorrect installation of mechanical parts, etc., which leads to changes in the power of individual cylinders, resulting in the imbalance of the power of each cylinder, resulting in the unstable idle speed of the engine;

2. Indirect causesIt refers to the abnormal electronic control system of the engine, which leads to poor combustion of the mixture, which makes it difficult to balance the power of each cylinder and makes the engine idle unstable.

Car on a rainy day.

Driving precautions.

1. It is best to replace the wiper once a year. If the wipers' ability to sweep water decreases, it will be difficult to observe the road surface when driving in the rain. Especially when driving at high speeds, the wiper blades float upwards and the sweeping ability is even worse.

In addition, when driving in the night rain, the raindrops that are not cleaned will produce various reflections under the light, which will make the vision in front extremely blurred, which is easy to cause accidents.

2. Regularly check whether the drainage of the waterproof groove at the front windshield is smooth. Avoid water ingress into the engine caused by water accumulation in rainy days, and prevent short circuit of the on-board computer.

Hello friend, the situation you mentioned is mainly caused by the high-voltage electric short circuit caused by the moisture of the cylinder line. It is recommended that you focus on checking whether there is any crack in the cylinder line or the water ingress caused by the plug not plugged in properly. I hope I can help you, if you have any questions, please feel free to contact me.

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The most important thing in the rainy season is the maintenance of the "heart" engine of the car. Car owners will encounter the problem that the engine is not easy to start in rainy days, and sometimes even if it is barely started, it is also weak.

Solution: The biggest cause of this problem is the leakage of electricity caused by the ignition system due to moisture. Once it is found that the ignition is poor and the engine performance is degraded due to the dampness of the ignition system, you can temporarily wipe the inside and outside of the distribution panel and the wires with a dry paper towel or dry cloth, and if it is due to aging and leakage, it must be replaced in time.

In rainy days, it is often wading in water, and the performance of the car is reduced due to water ingress in many places after wading, which can cause the car to not drive normally. Of course, this is also most likely due to leakage from the ignition system due to moisture. Because turbid rain is the best conductor, circuits are likely to cause short circuits when exposed to water.

If the engine suddenly stops during the journey, do not start the ignition multiple times, you should wait for a while or get out of the car to check the circuit, otherwise it is very easy to cause the engine to be scrapped. When the car wades smoothly through the water, the circuit equipment should be maintained in time, and the circuit can be wiped dry one by one with a paper towel or dry cloth before starting.

The car's idle motor is on top of the throttle cooker. It is mainly used to bear the idle speed of the car, and its purpose is to adjust the idle speed according to the engine load at the time of idling, and the idle jitter can check the pointer fluctuation of the idle speed meter, and the general performance is not good combustion, if it is a new car, there will be no problem of damage to the idle components, because the combustion requirements of the turbo direct injection vehicle are very engaged, or clean the oil circuit first, before the idle pointer fluctuation idle jitter in the fuel tank after adding the Si Youpu fuel additive to run two tanks of oil is completely good.

The lack of cylinder at idle speed is not a problem with accessories, the problem comes from poor combustion, which will cause such a phenomenon. The oil circuit can be cleaned, and the gas station also regularly cleans the oil storage tank, not to mention the fuel tank of the private car. The oil circuit of the fuel tank is dirty, and if it burns badly, it will miss the post and catch fire.

Hello, check the line. This is obviously caused by water ingress causing electricity leakage.

If there is jitter after rain, it is related to the moisture in the air, and it is almost certain that it is a wiring problem. The effect on the formation of the engine is the lack of cylinders. The ignition coil and spark plug can be inspected to see if there is a problem with the high pressure or low pressure.

If there is a problem with high voltage, you can only replace the spark plug or ignition coil, if there is a problem with low voltage, re-wrap the line and do a good job of waterproofing. It is not difficult to solve this problem.

The first one is most likely due to a leak in the air intake system.

The second reason may be that the spark plug is broken, resulting in a lack of cylinder.

Some spark plugs are not of good quality, which will lead to damage during use. Once some spark plugs are damaged, then it will cause the engine to shake, acceleration is weak, the original foot of the throttle can be accelerated immediately, but after the spark plug failure, you step on a foot and feel no response, or slowly move forward, this situation should be timely to the repair shop for testing, decoder decoding, which component is the problem, replacing the spark plug can solve the problem.

Many cars nowadays have electronic throttles, and once this fuel injection system fails, it will cause the engine to shake and idle unstable. The service life of the electronic throttle also has a certain period, once it is old, after the service life is long, there will be abnormal failures, and at this time it must be replaced in time, which can solve the problem of unstable idling.

Of course, you should also check this idle motor, because sometimes the motor is abnormal and the body will shake, and even the car idling is high and low, of course, for the owner, if he is not professional, it is best to find a master in the repair shop to solve the problem, this is the fastest.

It may be that there is a problem with the engine, or you need to go to the repair shop to check it so that you can know what the problem is, and then you can repair it, so that the problem can be solved.

It should be that there is a problem with the engine, there may be a failure of the clutch, there may be too much carbon deposit, there may be a problem with the spark plug, or there may be a failure of the trachea.

The ignition energy is a little low, the water temperature sensor is out of order, the valves and intake tracts are dusty, the mixing ratio is not suitable, or there is a problem with the car.

If the fuel pressure is too low, it will cause the fuel sprayed from the injector to be in a poor atomization state, or the fuel injected will be linear, and only oil droplets will be sprayed in severe cases, and the reduction of the amount of fuel injected will make the mixture too thin, which will occur.

I think this is probably due to an abnormality in the ignition system. This is the case because there is an abnormality in the ignition system, which will affect the combustion of the cylinders, so that the power of each cylinder is different.

The engine has too much carbon deposit.

The air filter is not replaced.

Low ignition energy.

The water temperature is not normal.

The injector is clogged.

Sudden engine shaking and unstable idle speed may be due to excessive carbon deposits in the engine or low ignition energy.

Causes of unstable car idling;

Throttle oil and throttle carbon deposits, dirty intakes, blocked intakes can cause idle pulling, throttle carbon deposits or oil are the most common causes of unstable idling.

Spark Plug Failure: Weak sparks caused by individual spark plug failures can also cause carbon deposits, which can be cleaned to restore spark plug activity, but some spark plugs have a fast lifespan and can reduce performance.

Blocked oil circuits: There are also oil circuit blockages and intake pipe failures represented by fuel injectors. When the oil circuit represented by the injector is blocked, the fuel supply pressure is insufficient, the fuel atomization is poor, the mixing ratio is unbalanced, and the combustion is incomplete, which leads to the failure of Changying return.

Specific solutions to 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 abnormal or the intake pressure sensor is incorrect, it will 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 carbon deposits exceeding the hunger resistance standard 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.

The main reasons for the unstable idle speed and idle shaking of the vehicle:

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 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.

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 is wrong and works poorly, 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 the combustion in the later stage, and the carbon deposition exceeds the standard. We can only gradually alleviate most of the problems by maintaining clean oil circuits.

The phenomenon of idle jitter in the automobile bureau is actually very common, and there are many reasons for the engine jitter phenomenon, such as blocked fuel injectors and spark plug electrodes.

Severe ablation and dirty throttle valves are more common causes. There is also a less common cause of engine fulcrum aging when the engine is supported.

Point damage to the engine vibration conducts into the car. Tong Lu Xun.

Hello, there are many reasons why the idle speed of the car is unstable and easy to stall, such as air intake system leakage, fuel pressure is too low, air filter blockage, oil leakage from atomization of large oil injector, improper idle speed adjustment, poor spark plug work, air flow meter failure, etc. The extended information about idle speed is as follows: 1. Introduction:

Idle is a condition in which the engine is running in neutral gear. The rotational speed at which the engine is idling is known as the idle speed. The idle speed can be adjusted by adjusting the damper size, etc.

Idling is the engine "not working". 2. Normal idle speed: the vehicle starts the engine in the parking state, and the lowest speed of the stable operation of the engine is called parking idle speed (the process of the engine changing from the idle state of the cold car to the idle state of the engine reaching the normal working temperature is called warm or hot car).

The specific causes and solutions of unstable idling after the car starts:

1.Intake manifold leakage: When the air that should not enter the intake manifold, gasoline steam gas, and combustion exhaust gas, the mixture is too thick or too thin, resulting in unstable idling of the car.

Solution: Check the manifold and replace it in time if there is any air leakage.

2.Excessive carbon deposition on the throttle: excessive carbon deposition on the throttle and surrounding air intakes, and changes in the cross-sectional area of the airway, which makes the control unit (check the transaction price|Matching|Preferential policy) Nianyun can not accurately control the idle air intake, which also causes the mixture to be too thick or too thin, resulting in unstable car idling.

Solution: The best way is to clean the oil circuit, regularly clean Chungaoxin, and use PNF fuel additives to solve the problems caused by carbon deposition. 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.