What s going on with the car idling and shaking?

The idle speed of the manual gear car should be at 750 rpm (750 rpm). The idle speed of the automatic transmission should be at 850 rpm (850 rpm). If the idle speed is around 750 rpm but the body is shaking, then 1 may be that one of the spark plugs is not working.

2. The oil circuit is not clean or unblocked. 3 There is a problem with the ignition system, such as an internal open circuit in the spark plug wire, or leakage. 4. The contact officer of the ignition sub-panel is police, resulting in poor conductivity.

You can do all of the above yourself, and if it's not for these problems, you should find a professional. Typical phenomenon of fire failure and lack of cylinder It is estimated that it is basically normal for a car like you to run at high speed, but it is estimated that the fuel consumption is already larger than usual. Replace the entire set of high-voltage wires, distributor covers and high-voltage caps inside.

Generally, there is no problem. Of course, the spark plug also takes a look, but I don't think it's a big problem 1The idle measuring hole of the carburetor is slightly blocked or does not wear regularly; 2.

Leakage of the vacuum line of the carburetor; 3.whether the fluid level of the carburetor is high or low; 4.It's just that the idle speed is shaking, then there must be no problem with the ignition coil; 5.

You can pull out the high-voltage line of each cylinder to see if there is a change and whether there is a uniform spark. 6.If there is no problem with all of the above, just look at the removal of the spark plug and look at the gap and loss!

7.Measuring cylinder pressure detection is basically the same! Clean the carburetor, adjust the air-fuel ratio, and check the electrical system (whether there is a missing cylinder).

Idle shaking, indicating that there is a problem with the oil circuit, especially when the air conditioner is turned on, the solution is: 1. Clean the throttle 2. Clean the fuel return pipe 3. Check and clean whether the oil return of each cylinder is open when it is charged 4. Replace the gasoline filter (recommended) 5. Replace the air filter of the air conditioner OK. Hope it helps.

Maybe there's something wrong with the electronic control part! The insufficient pressure of the large pump leads to insufficient atomization of the fuel injection! Noticeable at idling.

The idle speed is too low, the temperature is too low, and the fuel supply of the oil pump is not smooth.

A slight shake is normal, the landlord is a Jetta, that is, Volvo's idle speed has to shake!

Is the idle speed a little low, and then it depends on whether it is a lack of cylinder.

The engine has serious carbon deposits, such as the fuel injection is absorbed by carbon deposits during cold starting, the mixture is too thin, and after the carbon deposits absorb and saturate the car, the gasoline adsorbed in the carbon deposits is released and burned, and the mixture becomes thicker. The mixture is sometimes dilute and sometimes thick, causing idle shaking. This phenomenon is exacerbated by low temperatures.

Ignition system problems, such as poor working of high-voltage wires, ignition coils, spark plugs.

The oil pressure is unstable, such as the inlet pressure sensor is abnormal, and the oil supply pressure of the oil pump is abnormal.

Aging of engine components, such as cylinder wear and unreliable cylinder pressure; Loose valve closing; Loose engine feet, etc.

The causes of idle engine shake are roughly as follows, gasoline problems, lack of cylinders, dirty throttle valves, and carbon accumulation in fuel injectors, which are investigated and solved one by one.

Idle shake is generally caused by carbon deposits, you can clean the throttle first and try it, that's it!

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.

The following are the causes of the car's idle jitter: 1. The temperature in the engine is not enough, and the temperature of the fuel and lubricating oil is not enough. When the water temperature is low, it belongs to the cold car, the engine sound is very loud, especially in winter, the sound is the same as the tractor, and the vibration is larger, the hot car can, this is a normal phenomenon, because the cold car combustion lubrication is not good, the cold car speed is high, the hot car speed is low, the combustion is not good, it is easy to accumulate carbon, the exhaust pipe is black, and some cars are accompanied by blue smoke in the first few seconds, which is the phenomenon of burning engine oil, which is a normal phenomenon.

2. The pressure of each cylinder is uneven, and the intake valve and intake pipe have too much carbon. 3. The oil injection is caused by too much colloidal carbon deposition inside the nozzle.

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 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 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.

The reasons for the idling and shaking of the car are: 1. The engine has serious carbon deposits; 2. The throttle is dirty or the fuel injector has a lot of carbon deposit; 3. The ignition system works poorly due to the failure of spark plugs, high-voltage wires and ignition coils; 4. The oil pressure is unstable, the oil supply pressure of the oil pump is insufficient or the value of the inlet pressure sensor is wrong; 5. Insufficient oil supply caused by oil circuit blockage; 6. Aging of engine parts. Car Idle Jitter Solution:

1. Clean up the carbon deposits of the engine and idle motor; 2. Clean the oil circuit; 3. Replace spark plugs, high-voltage wires and ignition coils; 4. Clean the air filter and throttle; 5. Replace aging engine parts.

The steering wheel shakes when the car is idling, which is very common, and some car owners can feel a strong steering wheel shake when driving the car at high speeds, when the speed reaches 80-100km h or more. In this case, most of the problems occur in the tires of the car, because the uneven distribution of the mass of the whole part of the tire will cause the wheels to rotate at high speed, and there will be a dynamic imbalance state, which will cause the steering wheel of the car to shake seriously while driving. In this case, it is necessary to align and dynamically balance the tires of the car, and in serious cases, the tires must be replaced.

In addition to the tires of the car, there may also be shock absorber failure, frame deformation, excessive meshing clearance of the main and driven gears of the final reducer, etc. If the steering wheel shakes when braking while driving, then it is very likely that the brake force is too strong and too frequent, which may cause the brake disc and brake pads to overheat and deform when cold, causing the steering wheel to shake.

Generally, the symptoms can be solved after replacing the brake discs and brake pads. If the speed of the vehicle is not fast, but the steering wheel shakes, it is possible that the steering belt of the mechanical steering system will slip when the belt is too loose, which will also cause the steering wheel to shake, and there will be shaking and abnormal noise when the steering transmission system is loose and the gap is too large, but this situation is rare.

My car A+

When I ran to 90 kilometers, the steering wheel shook badly, the tire balance was played many times, and the four-wheel alignment was also done, but it was not good, some people said that the tires were not good, but it only ran less than 20,000 kilometers.

If love is upside down.

It is recommended to buy a VCDS diagnostic cable on the Internet, just like this, and then take a look at these data as shown in the figure below through the engine

speed can know your current one.

Engine speed.

Whether it's too low. It's mine.

Xiali 3 cylinder is this data through the bank

1sensor

1status take a look at the front.

Oxygen sensor. The state of change can determine the concentration of the lower mixture, and finally, based on the data, determine whether the throttle or injector needs to be cleaned.

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.