How to clean the throttle when the car is not running?

Many car owners want to clean the throttle themselves, but they don't know how to do it or what to pay attention to. In fact, cleaning the throttle is a very simple operation. We can DIY with a little effort, without spending a lot of money to repair shops or 4s shops, and the cleaning effect is even better than theirs. Next, I will tell you the methods and precautions for cleaning the throttle.

1. First, you need to buy a bottle of accelerator cleaner and a piece of non-woven fabric. Note: It is throttle cleaner, not carburetor cleaner! These two things are different. The performance of throttle cleaner is mild, and carburetor cleaner is too corrosive, which will damage the special coating on the inner wall of throttle and the lubricating coating on the throttle shaft. If carbon deposition is not particularly serious, it is not recommended.

2. Park your car in an open and ventilated place. It is not recommended to clean the throttle in dusty places or garages. Also, be careful that there must be no fire source around the car, and don't smoke when cleaning the throttle, because the throttle cleaner is flammable and will burn or even explode when it meets the fire source. In addition, wait for the engine to cool before working, and do not disassemble and clean it when the engine temperature is very high.

3. Find the throttle valve along the air cleaner pipeline, and then remove the intake pipe in front of the throttle valve, and the throttle valve will be exposed to our eyes. But at this time, you will find that the throttle is off, and you can only clean one side of the replica, but you can't wash it inside. What should you do? Actually, this is very easy to handle. Now cars are all electronic throttles. We just need to turn the key to the "on" position and press the accelerator pedal with a heavy object, and the accelerator will be fully opened. We can see the carbon deposit of oil stains on the throttle wall.

The next step is the focus of action. We spray the accelerator cleaner on the clean non-woven fabric, and then gently wipe the inner wall of the accelerator to remove all the carbon deposits on it. Then spray a little cleaning agent on the throttle plate and gently wipe it with non-woven fabric to remove the carbon deposit stuck on it. Pay attention to the edge of the flip.

Some people say this is wrong. You should spray the cleaning agent on the accelerator and rub it hard, so you can clean it, but I tell you, it's not right. In fact, it is the carbon deposition on the inner wall and damper that affects the throttle, and whether other parts are clean will only affect the visual effect.

There is also a knowledge that many people don't know, that is, there is a special coating and lubricant on the throttle valve, which has the functions of dustproof, antistatic, reducing adhesion and lubrication. If this method is adopted, the coating will be cleaned off soon, and the service life of the throttle valve will be greatly affected. The more frequently the throttle of many cars is cleaned, the shorter the interval between the next cleaning. It is precisely because of the lack of this coating that carbon deposits are more likely to adhere to it. In addition, when the lubrication layer of the throttle shaft is damaged, the throttle action will be stuck, and there will be idle jitter, high speed and slow acceleration. In this case, the throttle must be replaced. Therefore, the more the throttle is cleaned, the better. My advice is: don't clean the engine as long as it has no symptoms.

After cleaning, we can put the intake pipe back. Attention must be paid to the installation: the intake pipe must be installed in place and the clamp must be clamped. If it is not installed properly, it will lead to air leakage in this part, the engine will shake, and a large amount of unfiltered air will enter the engine, which will aggravate the wear of the engine. In addition, all kinds of vacuum tubes installed on the throttle should be connected properly, not by mistake or by omission.

6. Start the trial operation. Generally, after cleaning the throttle valve in this way, there will be phenomena such as high idle speed and serious jitter, but you don't have to worry about this normal phenomenon, because the engine computer has adapted to the previous fault state and adjusted the throttle opening accordingly; Now you have eliminated the fault, but the engine computer has not adapted, and the throttle is still open before cleaning, so the idle speed will be high. At this time, it is necessary to make a throttle matching for the engine, that is, use the automobile diagnostic computer to restore the throttle opening to the original state. Of course, we don't have such equipment and technical ability ourselves. You can find a repair shop and let them do it. There is generally no charge. However, some models must be matched by special diagnostic computers. This ability is generally only available in 4s stores, and a match costs several hundred pieces, which is dark enough.

If it is not a very high-end model, you can take a more extreme approach: disconnect the battery cable, or unplug the fuse of the engine computer, wait 30 seconds before installing it, and the throttle will automatically return to its original position. But this may lead to the loss of other functions in the car, such as one-button window lifting, dashboard time display, sound system restoration and so on. Different models will have different reactions. If you can adjust it later, you can do so. In addition, it can be ignored because the engine computer has adaptive learning function. As long as we drive the car for dozens of kilometers, the engine computer will slowly adjust the throttle to the correct position, and the phenomena such as excessive idle speed and serious jitter will disappear. This process is called "engine adaptive learning".