Why does the engine smoke when Wuling Hong Guang cleans the throttle and nozzle?

When cleaning the throttle and injector, a lot of white smoke will come out from the exhaust pipe of the engine, and the smell is particularly pungent! This is not only a phenomenon that occurs when Wuling Hong Guang is cleaning, but also a phenomenon that occurs when many cars are cleaning. I just want to say: this is a very irresponsible behavior of maintenance personnel. Clean the oil circuit and air intake system regularly to reduce the influence of carbon deposition on the engine. This choice is very correct and necessary in our usual maintenance process. As long as the engine is running, carbon deposit will be produced, which is caused by many reasons. Most of the carbon deposits are concentrated in the combustion chamber, intake and exhaust valves and spark plugs, which is the result of incomplete fuel combustion. Throttle intake manifold is a combination of high temperature oil and gas and fine dust particles. As time goes on, these carbon deposits will have a destructive impact on the operation of the engine, such as unstable idle speed, weak acceleration and even a sharp increase in fuel consumption. The cleaning agent for cleaning oil circuit and oil nozzle is mainly composed of propanol and heavy aromatic solvents, which has a good dissolving and cleaning effect on colloidal carbon deposits. When cleaning, it is necessary to suspend the operation of the oil pump, that is, the cleaning agent is directly connected to the fuel nozzle rail through special equipment, while the cleaning of the throttle valve and intake manifold is to directly pressurize the cleaning agent, atomize it through the small nozzle, and then spray it into the intake pipe. This cleaning method is the most widely used at present, with simple operation, but the effect is average, especially for the cleaning of intake manifold. The carbon deposit in the intake manifold is the most widely distributed and the largest, which has the greatest intake resistance to the engine, so this cleaning can only cure the symptoms, not the root cause. Normal cleaning takes a certain amount of time, and it is necessary to ensure that the engine speed is about 2500 rpm, so that the cleaning agent can be sprayed evenly and then the combustion can be maximized. After that, there was not much smoke. But many maintenance masters know in their hearts that the effect is the same as time-consuming and laborious! It is best to increase the spraying amount of cleaning agent, which will cause a large amount of cleaning agent to accumulate in the intake pipe. Finally, opening the throttle helps digestion, and a lot of smoke will naturally come out if the combustion is not sufficient.