The solution to the unstable idle jitter of the air conditioner

On a hot day, the car air conditioner is one of the most frequently used configurations in the car, but the body will shake as soon as the air conditioner is turned on during idling, and it is different from the normal jitter, so is it normal to turn on the air conditioner and shake at idle? Is there any workaround?

The idle jitter of the air conditioner is different from the slight vibration of our normal engine idling, it is a more obvious jitter, a bit similar to the state when we first learned to drive, the oil separation cooperation was not skilled, and the car was about to turn off.

We need to know that the compressor will also work after turning on the air conditioner, and the compressor is driven by the engine, so the work of the compressor will increase the load of the engine. So how do car engines cope with this increased load? For most electronic throttle valves, the engine automatically raises the throttle opening to get more air intake, resulting in higher power output.

Therefore, if the throttle valve is not maintained for a long time, it is easy to produce carbon deposits, which will hinder the air intake of the engine, resulting in insufficient or reluctant engine to drive the compressor, resulting in the phenomenon of idle jitter.

The solution is to clean the throttle, which is not expensive, about 300 yuan, if your driving environment is relatively bad, then it is best to clean it regularly, it is recommended to clean it once after 10,000 kilometers.

It is worth mentioning that after the throttle is cleaned, due to the absence of carbon deposits, if the original opening is still maintained, then the air intake will be too large, resulting in engine shake and weak acceleration during starting, engine fault light alarm, etc. Then depending on the car, there are different ways to initialize the throttle:

One is to open the second gear of the key, which is the gear where the instrument indicator light is fully lit, and then wait for 20 seconds, step on the accelerator to the end, hold it for about 10 seconds, release the accelerator, turn off the ignition switch, pull out the key, and the initialization is completed.

The second is to open the second gear of the key, hold it for 30 seconds, and then turn off the ignition switch and pull out the key. It should be noted that after the two methods are done, you have to wait a little time before you can try to ignite, generally wait for about 15-20 seconds, and then ignite to see if the throttle is normal and whether the engine fault light is off.

The above is the content of "Air Conditioner Idle Jitter Unstable Solution", I hope it can help you. @2019

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.

It may be that a solenoid valve on the inlet is broken, if not, the upper dead center position sensor line in the distributor and the upper dead center position sensor in the distributor are detected, if no problem is found, it may be that the cold car starts normally and the hot car fault appears, and the analysis may be that the performance of the electrical components has deteriorated due to heating, and the distributor can be replaced for experimentation, if the fault still exists. The cause of the failure may be that the empty engine unit is faulty, and if the engine control unit is replaced, the fault still exists. I had to check other engine systems and items (such as fuel supply system, ignition timing, cylinder pressure, etc.), but if there was still no problem, check the engine voltage, measure the generator output voltage, engine speed, generator output voltage at idle, and if everything is normal, then turn on the headlights, after the air conditioning compressor, if the generator output voltage becomes unstable, in the hypothesis) runout, analyze the generator failure.

Hello, idle jitter is generally caused by unstable cylinder workmanship, there are many reasons for this, you can check whether the intake manifold is leaking, the oxygen sensor is faulty, there is a problem with the idle motor, etc.

Open the air conditioner idle speed on the combustion requirements are higher, because the idle air conditioner increases the amount of fuel injection and changes the amount of air intake to achieve the stability of the mixture, if you turn on the air conditioner like this, that is, the fuel combustion is not good, when you need to increase the fuel injection - that is, when the air conditioner idle, the intake air comes in, but the mixture because your fuel injection is not enough to dilute, it shakes. It is very simple to deal with, only use two China VI standard fuel additives after normal driving, and it will be cleaned quickly after hundreds of kilometers to improve and eliminate idle jitter.

Dear, hello, I am glad to answer for you: First of all, when the air conditioner idles and shakes low, it may be caused by excessive no-load current of the motor bearing or refrigerant leakage, so it is recommended to check the motor bearing, and replace the air conditioning filter, solenoid valve and refrigerant inflation and other components to reduce the load of the unit and ensure the smooth and reliable operation of the unit. In addition, in order to avoid the occurrence of low jitter phenomenon at idle speed before late annihilation, it is necessary to check whether the installation of the air conditioner is qualified, ensure that the wiring between the SMD 230V power supply and the air conditioning power supply is good, and ensure that the water tank capacity inside the air conditioner meets certain requirements, and ensure that the resistance of the intake fan can support the capacity of the unit and ensure the air flow.