What is the reason when the car turns on the air conditioner and idles and shakes

Hello, idling body shake is a common situation encountered by many car owners. If the owner finds that the body shakes significantly while starting the vehicle or stopping the vehicle without turning off the engine, it may mean that the vehicle has one of the following three conditions:

1.The most common cause of car shake caused by serious carbon deposits in the engine is that the throttle valve is too dirty or the fuel injector is too much carbon. When there is too much carbon inside the engine, the gasoline ejected from the cold-start injector will be absorbed by the carbon deposit, resulting in a cold-start mixture that is too thin and makes it difficult to start.

In this case, only when the gasoline absorbed by carbon deposits is saturated, it is easy to get on the car, and the gasoline adsorbed on the carbon deposits will be sucked into the cylinder by the vacuum suction of the engine after the car is burned, and the mixture becomes thicker, and the combustible mixture of the engine is dilute and thick, resulting in 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.

2.Ignition system problems 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 flashing condition is not good will also lead to this kind of failure.

Solution: Check whether the spark plug has too much carbon deposit, and replace the spark plug.

3.If the oil pressure is unstable, if you have cleaned the engine carbon deposit, washed the throttle, changed the oil pad and spark plug, etc., and still found that the body shakes when idling, it is recommended that you 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 value is wrong and the work is not good, the body shakes will be caused.

Solution: Check the oil pressure and replace the parts if necessary.

4. Aging of engine parts.

Car jitter is also related to the aging of the engine feet (also known as claw pads). 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.

Caused by insufficient vehicle power, engine failure, or spark plug failure.

After the compressor of the air conditioner is started, the pressure is too high, which causes the vehicle to vibrate, and the engine of the vehicle needs to be repaired or replaced in time.

The carbon deposition of the engine valve is serious, which makes it difficult to start the vehicle, and the load on the engine will increase, resulting in jitter, and the owner needs to clean the throttle valve in time.

If the spark plug inside the engine is damaged, the spark plug will be damaged by carbon deposit, or the spark plug will be poorly flashed, which will affect the normal operation of the engine, and the owner needs to clean or replace the spark plug in time.

The fan blades of the air conditioner fan are deformed, so when the air conditioner is working, the fan and the engine will resonate, and the owner needs to replace the damaged fan in time, so that the vehicle will not shake.

Carbon can cause insufficient combustion of gasoline, causing the engine to shake. The impact of engine carbon deposition on the car is quite large, first of all, to reduce the engine power, that is, to make the power output uneven and gradually decay, 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, the difficulty of ignition, it is not easy to get on the car, and finally the carbon deposit in the combustion chamber is strict, and a heavy one will also cause cylinder detonation, and there will be a sound of low-speed acceleration, which will cause damage to the piston and crankshaft, and cause high temperature of the engine, which will seriously affect 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.

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.

1. Serious carbon deposition in the engine: carbon deposition in the engine is the main reason for the shaking of the car, when there is too much carbon deposition inside the engine, the gasoline sprayed by the cold start injector will be absorbed by a large amount of carbon deposition, resulting in too thin mixture for cold start, resulting in more difficulty during cold start.

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

2. Ignition system failure: spark plug is a wearing part, which needs to be replaced regularly, if it is found that the spark plug has too much carbon deposition or the ignition gap is too large, it needs to be replaced, and it is also necessary to check the working state of the line: high-voltage wire and ignition coil, and the car computer can be used to determine the state of the ignition system.

Hello! This cannot be generalized, some can be solved after replacing the spark plug failure, and some can be solved by cleaning the throttle.

Hello, turning on the air conditioner will start, and it is normal for the compressor to have a slight jitter.

Turning on the air conditioner will weaken the power of the engine, and it is normal for the idle speed to shake.

Hello, in such a case, you can check whether the throttle has the cause of carbon deposits.

It is recommended to clean up the carbon deposits on the throttle valve of the engine.

It is normal to turn on the air conditioner compressor and have a slight shaking.

Hello, that means that this carbon deposit can be cleaned and solved.

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.