The car idles and shakes, the generator fault light is on, and the shaking is terrible while driving

The car idles and shakes, the generator fault light is on, and the shaking is terrible while driving, what's going on? I believe that the landlord said, indeed the oil is not too good, after the car shakes, the new car is only 3000 kilometers, can not find any fault code, the store said that the oil problem can not find the fault code, and then a master to add the division of the general fuel cleaning agent, after running two tanks of oil, the car does not shake.

1.A dirty throttle can cause the BAI to shake at idle.

2.A faulty spark plug can cause the vehicle to idle and shake.

3.The engine has an inner cylinder that does not work, which can also cause idle speed shake, and there will also be vehicle shake when the vehicle accelerates at low speeds.

4.The rubber parts inside the engine mounts and transmission mounts are aging and open, causing the vehicle to idle and shake.

After some use.

There will inevitably be some carbon deposits inside the engine DU in the DAO time, which will lead to changes in the design parameters of the engine return, and at the same time, its properties are unstable and heat is accumulated, which will lead to disorderly ignition of the engine, thereby causing engine detonation. In this case, the engine fault light is also illuminated.

Solution: Open the oil cap, pour the whole tank of cleaner (mixed with the old engine oil), close the oil cap, turn off the ignition after idling for 10 minutes. Cleaning the carbon deposits inside the engine, the detergent dissolves the sediments such as sludge, gum, moisture and metal debris inside the engine, and can reduce the pollution of new engine oil and prolong the service life of the engine.

The valve closure caused by mechanical failure of the engine is not tight, and the pressure of each cylinder is not the same; The throttle in the air supply system is dirty or the throttle is damaged; The pressure of the fuel supply system is too low or fluctuates greatly, and the carbon deposition of the injector is serious. Generally speaking, the more cylinders the engine has, the slower the engine idle shake, and the inline six-cylinder engine has the best ride ride due to the automatic balance vibration in the structure; However, the three-cylinder engine, which is now widely used, has extremely poor ride ride and needs to design a balance mechanism to maintain normal operation.

If you can clearly feel the car vibrating while sitting in the car, the hands on the steering wheel feel vibrating, the tachometer needle jumps up and down, or you can clearly see the engine shaking when you open the engine compartment cover, it means that the engine is shaking too much. At this time, use the engine fault diagnostic instrument to view the engine data stream, you can see that the engine speed value is high and low, under normal circumstances, the engine speed will not jump up and down for more than 30 rpm, if this value exceeds 50 rpm, you can judge that the engine idle shake is too large.

Find the cause of the failure:

Combustion problems. A combustible mixture is like the blood in the heart, and when blood circulation is blocked, the heart cannot perform its normal functions. Oxygen is required for combustion, and the ECU sensor directly detects the oxygen content in the cylinder.

According to the combustion of CH+O2=CO2+H2O, insufficient oxygen content will cause incomplete combustion, and incomplete combustion of CH particles will not only cause atmospheric pollution, but also aggravate the wear of the cylinder. Cause of detonation. If there is a knock during driving, there will be major damage to the parts, the car may run out of power at this time, or the driver will hear a noticeable knocking sound.

Fuel reasons. The quality of the blood itself is also related to the operation of the heart, some gas stations provide fuel that does not meet the requirements in violation of regulations, and the compression ratio is too high or too low to become unqualified fuel, which will inevitably lead to the failure light to turn on.

What is the danger or hazard when the fault light is on:

If the fault light is on but not dealt with in time, it will not only lead to an increase in the pollutants discharged by the car and increase the environmental pressure, but also the increase in particulate matter will lead to increased wear and tear of the car and accelerate the scrapping of the car.

How to deal with these problems on your own:

Wash the sediment. Clean it yourself with good additives or open it to 4S to do cleaning. Replace the fuel and choose a high-quality fuel with a high grade.

Car owners buy their own high-quality fuel additives to improve fuel cleanliness. If it still lights up after the above method, there may be a problem with the sensor itself and the sensor should be replaced.

Note: The engine fault light is lit like an instrument alarm specifically for the heart to check, the stable parameter body change or the parts are destroyed to affect the safety or power of the car, the fault light is the sentry of the heart of the car, if there is no it, you will never know whether the car is in a healthy state or a disease state, at this time, if you ignore the fault or shield, it will cause a serious safety accident.

The engine cannot rotate or rotates too slowly due to the failure of the starting system: the battery is not stored enough, the electrode pile clamp is loose or the electrode pile is seriously oxidized; The main fuse of the circuit is broken; Ignition switch failure; starter failure; The starting line is broken or the line connector is in poor contact.

There are several possible types of engine shake.

1."The air filter is dirty, clogged, zhi

And it was not replaced in time, or it was a high DAO

The crimping line breaks the inner circuit and affects the ignition to cause the jitter of the starting capacitor.

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

3.Dirty throttle valves, clogged injectors, or low cylinder pressure can cause engine jolting.

The icon of the engine fault light is as follows.

Shown: Oil deterioration. Different grades of lubricating oil will change the oil quality during use.

After a certain mileage, the performance of the vehicle changes, which can cause various problems for the engine. In order to avoid these failures, the car should be regularly changed in combination with the conditions.

1. Observe the engine status self-test light.

2. Pay attention to whether the coolant temperature of the engine is too high.

3. Pay attention to whether the engine is short of oil.

4. Observe whether the engine runs smoothly.

5. Done.

It is possible that it is the engine.

Go to the local place where you can park on the side of the road and stop the car, and see if the fault is eliminated after the fire is restarted.

If the engine is working normally, don't worry, it means that the car is fine, the oil quality is fine, it is just caused by accidental bit error, and there is no need to clean the oil circuit or engine. Sometimes after a period of time, the fault light will go out by itself, if it does not go out, you can go to the 4S store to decode and remove it with a computer, or replace the oxygen sensor.

Main causes of idle jitter:

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 abnormal work of one or more cylinders of the engine, 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 that starts this Zen machine. 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.

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.

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 starting, and the more carbon deposits will affect cold starting.

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 whether there is a fault in the ignition tether system and whether the spark plug has too much carbon.

3. The oil pressure is unstable. If you have cleaned the carbon deposits in the engine, 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.

4. 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 beginning of 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 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 lead to no good fuel can 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.

Poor ignition. Cause: Spark plug aging Dirt Treatment: Cleaning Replacing.

The fuel injector hall is clogged and cleaned without a tube.

Poor quality gasoline change filter to wash the tank.

The other thing is that if you're using ethanol gasoline and you're an old car, the engine will clear the idle jitter in winter, and that's too much carbon deposit.

It should be a slight lack of cylinder, the output power of the engine cylinder is uneven, resulting in the engine shaking, and the hall skin triggers the fault light alarm. Volt.

It is recommended to inspect components such as spark plugs, ignition coils, etc.

Which cylinder should have misfired.

There are many possible causes for engine and exhaust system failure lights, which can be roughly divided into the following three categories:

1. False failure. Report the fault**, but the work is normal, it may be that a certain operation is beyond the control of the computer, and the fault of the computer feedback can be eliminated first, and then see if the fault code is still jumped.

2. Minor faults. There is no particularly obvious fault in the engine, according to the computer detection information and further inspection, it is found that there is really some kind of fault, which does not affect normal driving or has little impact, and needs to be found and solved in time. For example, the inlet pressure sensor is faulty, etc.

3. Major failures. Such faults are noticeable to the naked eye and driving sensations, and seriously affect the normal operation of the engine, requiring immediate repair. For example, the engine is obviously underpowered, surge, etc., which is likely to be a problem with the oxygen sensor.

In this case, it is recommended that you can check the front and rear oxygen sensors first, this thing is broken, and the initial appearance is shown in the instrument to show that the engine fault light is on for a long time (or occasionally flashing), but the car can barely drive for a short time;

If it is not repaired for a long time, the computer (ECU) of the electronic fuel injection system will not be able to obtain the information of oxygen concentration in the exhaust pipe, so it will not be able to feedback and control the air-fuel ratio, which will increase the fuel consumption and exhaust pollution of the engine, and the engine will have unstable idling, lack of fire, surge and other fault phenomena. Therefore, it is necessary to troubleshoot or replace it in a timely manner.

Generally, today's cars have two oxygen sensors at the front and rear, respectively in the front and rear of the three-way catalytic converter, and the faulty one should be replaced in time. The failure of this product mostly occurs in the case of mixing gasoline (ethanol gasoline, etc.) with different grades and types of gasoline in different regions, or adding fuel treasure.

If that's the problem, hurry up, don't delay. In 4s, plug in the computer and measure the exhaust gas flow data feedback.