Is it normal for the air conditioner to idle and the body shakes?

The most common cause of unstable idle and jitter in a car engine is a lack of cylinders. Lack of cylinder means that some of the four working cylinders or six working cylinders of an engine do not work or work poorly, which will lead to unstable engine power output and resulting engine shaking. The easiest way to diagnose engine cylinder shortage is the "cylinder breaking method" diagnosis, and the specific method is as follows:

When the engine is running, use a wrench to disconnect the high-pressure oil pipe of a cylinder or break the plug, if the engine is obviously unstable and more shaky, it means that the cylinder is good, if the engine is running as usual before the cylinder is not broken, it means that the cylinder is not working; This is the simple "cylinder breaking method", simple and practical, but it requires the operator to have a certain amount of maintenance judgment experience, if there are conditions, you can use a special engine operation detection oscilloscope detection. There are many factors that can contribute to the specific engine cylinder shortage. For example, if there is a problem with the ignition system, check the working condition of the spark plug, high-voltage wire and ignition coil, the ignition system is not working well, and the spark plug is not in good condition and the spark plug is not in good condition will also lead to this kind of failure.

Solution: Check whether the spark plug has too much carbon deposit, and replace the spark plug. The engine has a lot of carbon deposits.

The most common cause of car shake is a dirty throttle or excessive carbon build-up in the fuel injector. When the carbon deposition inside the engine is excessive, the gasoline sprayed by the cold start fuel injector will be absorbed by the carbon deposition in large quantities, 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 on the car, and the gasoline adsorbed on the carbon deposition after the car 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, causing 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.

Solution: Clean the oil circuit and check whether the idle motor has carbon deposits and should be cleaned. Aging of engine components.

Car jitter is also associated with aging of the engine feet. The engine foot is actually the suspension system of the engine, and the engine foot is responsible for absorbing the subtle shake of the engine when it is running, and if there is a problem with the engine foot, these vibrations will be transmitted to the steering wheel and cab, causing shaking when idling. The oil pressure is unstable.

If you have cleaned the engine carbon deposits, washed the throttle, changed the oil pad and spark plug, etc., and still found that the body shakes when idling, it is recommended 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 wrong and the work is poor, the body shake will be caused. Solution: Check the oil pressure and replace the parts if necessary.

The car appeared, idling at 700 rpm at idle speed, and not shaking at 800 rpm when the air conditioner was turned on. However, most of the reasons are actually like this, and the throttle has nothing to do with these, if the throttle is not good, the 700-750 rpm idle range will keep shaking, and you will feel the throttle delay stuck when starting to give oil. This kind of air conditioner does not shake when it is turned on and does not shake when it is idle to feed oil, which is caused by poor atomization and poor fuel combustion.

You can use some national VI standard oil circuit cleaner to clean it, and the fuel injector is atomized The oil circuit is clean and the carbon deposit is decomposed and reduced.

In summer, the idle jitter of the air conditioner is very strong, and many accessories can not be solved by checking and replacing it, including replacing the foot glue, rain nozzle, spark plug ignition coil, and replacing the large fan keel, all of which can not be improved After turning on the air conditioner for a period of time, the obvious idle jitter begins to appear, according to the master's suggestion, I began to try to do carbon deposition cleaning, because it is an EFI truck, so the focus is on carbon deposition cleaning in the manifold pipe. After the cleaning of a tank of fuel, it is basically clean, but because the kilometers are more than 3w, in order to ensure the overall cleanliness of the oil circuit, the master suggests that the follow-up will continue to be cleaned 2 times, and the next 10,000 kilometers can be cleaned once. The direct injection truck is recommended to be cleaned once every 3000-5000 km.

Zotye Automobile began to clean the oil road carbon deposits, and once alleviated the idle shaking of the air conditioner.

Initial mileage: 37841km

Re-inspection mileage: 38382km

Clean mileage: 541km

The number of kilometers before cleaning is 37871

The number of kilometers after cleaning is 38382

There is not a lot of carbon accumulation in the valve roof and mispath before cleaning.

After cleaning, the valve is clean, and the metallic color inside the mischief appears.

There is not a lot of carbon accumulation in the valve roof and mispath before cleaning.

After cleaning, the valves are clean and the mispaths are clean.

After cleaning, after cleaning.

Summary: At present, after cleaning, the idle jitter of the air conditioner is significantly reduced, according to the advice of the repairer, this kilometer can be cleaned twice in a row to thoroughly improve the working condition of the oil circuit. With the increase in driving, the improvement will be more obvious, and there is hope, although the problem has not been completely eliminated, but the improvement is obvious.

In the future, I feel that I should clean the oil road once every 5,000 kilometers, and I will maintain the car better, and it will be too troublesome to save problems.

According to the advice of the repair shop, if the steering wheel is shaking, you can also use the general pressure anti-wear agent after dozens of kilometers of driving, which will significantly reduce and alleviate this kind of shaking vibration without accessory failure.

There may be two reasons for this, so check how to deal with the specific problem.

1. With the increase of mileage, the vehicle will produce carbon deposits in many places, especially the throttle. If the throttle is dirty, it can block the air intake, resulting in an engine that is not strong or barely able to drive the compressor. Therefore, there was a situation where the air-conditioned car was shaking.

2. There will be vibration when the engine is working normally (including after starting the compressor), but some of it will be filtered out through the engine mount, so we don't feel obvious. If the engine mount collapses or breaks, the balance of the engine is broken, and the resonant frequency may be reached when the compressor is turned on, which can increase the vibration.

When the car turns on the air conditioner and shakes, check whether the throttle valve is clean, and then see if it is a problem of missing cylinders.

Idle air conditioner body shaking, idle fluttering, difficult starting, high idle speed, exhaust overrun are all attributed to poor combustion resulting in carbon deposits and other problems, it needs to be cleaned on time. It is also necessary to clean the carbon deposits every six months, perhaps 10,000 kilometers, every six months. It's a bit normal, it's okay, just don't do it for a long time, because this will cause severe carbon accumulation for a long time, resulting in a decline in engine function.

It is best to get used to 10,000 kilometers of fuel additives at a time and keep them normal.

The reasons why a car will shake when idling after turning on the air conditioner are as follows:

Carbon deposits can cause insufficient combustion of gasoline and cause the engine to shake. The impact of engine carbon deposits on cars is quite large.

The first is to reduce the engine power, that is, to make the power output uneven and gradually decayed, in other words, more and more powerless. The second is to increase fuel consumption and increase your financial burden. The third is the difficulty of cold start, that is, it is difficult to ignite, it is not easy to get on the car, and finally the carbon deposit in the combustion chamber is strict, and it will cause cylinder detonation.

The low speed acceleration has a loud sound, which causes damage to the piston and crankshaft, causing high engine temperature and seriously affecting the safety of the car. Then there is the excessive discharge, which not only fails the annual inspection and inspection, but also directly aggravates the harm of polluting the environment.

Solution: Regularly clean the oil circuit, check the idle motor, and clean the throttle. Ignition system failure:

Spark plugs are wearing parts, which need to be replaced regularly, if it is found that the spark plug has too much carbon or the ignition gap is too large, it needs to be replaced, and it is also necessary to check the working state of the high-voltage wire and ignition coil, and the car computer can be used to determine the state of the ignition system.

Oil pressure problems: 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 wrong and the work is not good, it will cause the body to shake.

One condition is the lack of engine power, which often happens in cars with small displacements. Another situation is that there is a problem with the engine idle valve, when the air conditioner is turned on, the idle valve can not be increased, increasing the near air volume, most of which is caused by the idle valve being too dirty.

Hello, the idle air conditioner shakes because the engine power is consumed when the air conditioning compressor is working for refrigeration, and the engine shakes due to the increase in engine load and the decrease in speed. When the engine carbon deposition is serious, the gasoline sprayed by the cold start fuel injector will be absorbed by a large amount of carbon deposition, resulting in the cold start mixture is too thin, and it will be more difficult to start cold, which will lead to large frequency shaking, the solution is to regularly clean the oil circuit, check the idle motor, and clean the throttle.

The most common time for engine idle shake is when the electrical system is turned on, if you step on the brake to hang D gear, turn on the air conditioner (AC compressor switch to turn on), turn on the headlights, the engine begins to shake, and the speed does not drop because of the load of the compressor, which can be determined to be the problem of aging of the engine's "foot glue", and the problem of shaking can be solved by replacing the foot glue.

If the oil pump supply pressure is abnormal or the intake pressure sensor is wrong and the work is not good, the body will shake.

Car air conditioning is a kind of high-power electrical appliances, the car will lead to an increase in the load of the engine during driving, for some small displacement cars, for example, or engine models, it is normal to have jitter, if the shake is very strong, you should first check whether the quality of the oil is a problem, sometimes the poor quality of the fuel filled by the car will also lead to the engine shaking, because there are more impurities doped in the fuel, so there will be jitter, you need to check the problems of the car one by one.

One, the air conditioner does not speed up!

Generally, the idle speed of the car is maintained at about 800 rpm! If you turn on the air conditioner, under normal circumstances, the idle speed will increase accordingly, generally maintaining above 1000 rpm, so as not to idle and shake!

This speed is mainly determined by the computer control throttle, if the air conditioner is turned on, the idle speed is not accelerated, then clean the throttle first, rematch, and it can generally be solved!

There are also some cars that control the solenoid valve and control the vacuum (air intake) to speed up!

Second, the ignition coil or spark plug breakdown!

If you don't turn on the air conditioner, the speed is a little sluggish or the idle speed is a little unstable! After turning on the air conditioner, the idle speed is shivering, which means that there is a problem with the ignition coil or spark plug or cylinder wire! Lack of tank or incomplete work!

Third, the compressor pressure is too high!

If the air conditioning pressure is too high, it will increase the load on the engine! It can also cause jitter!

Generally, the condenser does not dissipate well, the refrigerant is too much, and the air conditioning pipeline is dirty, which may cause excessive pressure, indirect or shaking!

When the air conditioner is turned on, the car compressor starts, the load increases, and the load increase may cause the car to idle and shake, the main reasons are: the air conditioner does not speed up, the ignition coil or spark plug breakdown, and the compressor pressure is too high.

Turning on the air conditioner and idling shake is that the power output on the engine's side is not enough, in general, there is a problem with the idle motor, which cannot be adjusted in time. Idle speed. Well, so the idle speed will shake, and the second one is the throttle. The reproduction is particularly dirty in the vicinity. This is also the case.

After turning on the air conditioner in summer, the engine is shaking, this is because the idle speed of the engine is low, turning on the air conditioner, the engine load increases, in this case, we need to turn the idle speed of the engine a little higher, you can solve the phenomenon of turning on the air conditioner jitter.

The possible reasons are: the first point is caused by excessive carbon deposition inside the engine, the second point is caused by problems in the ignition system, and the third point is caused by unstable oil pressure and the oil pump can not supply oil in time.

When the air conditioner is turned on in a small displacement car, the idle speed shake is more or less a bit, because it consumes a certain amount of engine power.

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 related failures.

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 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.