Can the 4s shop clean the throttle?

At present, the profit of vehicle sales is not large, so many 4S shops take after-sales service as their main profit point. So now, as long as we go to 4S shops for vehicle maintenance, it will always recommend various cleaning services, such as cleaning. Throttle, net injection, net ternary, etc. In fact, most of them are unnecessary, or the cleanest thing is not to do it so early!

Accelerator and injection port are clean, which will be recommended by 4S shops of major brands, and the difference is neither too early nor too late; For example, about 4S, it is generally chosen to clean up around 20,000 kilometers. Of course, there are some bad shops. Novice riders are usually recommended. The first insurance company began to do all kinds of cleaning. Compared with newcomers, cars are more likely to realize this suggestion. In fact, it's just a waste of money and unnecessary; If you want to clean the machine, it may take 40 thousand kilometers!

About cleaning the throttle, that is to say, the carbon of the engine is different from that of other parts of the throttle, and the hollow door is formed by some shells and there are impurities in the air, so it is basically the air opening of the throttle, and only it belongs to carbon. After all, the throttle is running on the machine, the temperature is not high, there is no high temperature, in which carbon (it can reach about 300℃ behind the intake valve)? So there is no need to clean the throttle so early; The cleaning cycle of throttle is related to throttle position, turbine or self-priming and air quality.

We all know that the carbon deposit on the back of the intake valve is directly related to self-priming or direct injection. However, it doesn't matter if you fill in the door; In fact, the carbon deposition rate of throttle and its relationship with the position of throttle closure! For example, the throttle of some cars is placed under the intake manifold, and then the crankcase ventilation system returns the mixture of liquid oil (including gasoline and engine oil). There are many possibilities. Under the action of gravity, it returns to the vicinity of the throttle from the intake manifold, and then the impurities in the air are mixed to produce the throttle shelf!

Moreover, the throttle of many models is arranged above the intake manifold. If this layout is a naturally aspirated engine, then the throttle valve is 65,438+000,000 kilometers dirty, because the crankcase ventilation system of naturally aspirated engine has only one air return pipe, only one behind the throttle valve, only one behind the pressure valve, only one behind the pressure valve and one behind the throttle valve. (intake manifold), because the naturally aspirated engine manifold is always negative, the rear row is enough, and the throttle is also arranged above the manifold! In this way, no matter how much oil it contains, it is impossible to approach the gas chart. This throttle is not clean. Suggestion (suggestion/kloc-cleaning once every 0/00000 kilometers)!

As for the cleaning of the injection port, it also depends on the specific cycle. Generally, it is 30 thousand to 40 thousand kilometers, so it is necessary to study it; In fact, pulling the car to high speed, or using some pea ingredients (suitable fuel additives are suitable for direct injection, which has a good effect on cleaning the injector; 4S stores don't need to do this. It's too expensive! As long as the engine is running, carbon will increase, so carbon actually cooperates with the engine. All friends don't have to be too afraid of carbon, just clean anyway! No matter whether the throttle or the fuel injector needs to be cleaned, it is not too late to do this research when the mileage reaches 4500 kilometers, because which throttle is installed on the self-priming cup above the manifold, clean the throttle after 100000kg!