My friend's Roewe e950 car is more than 30,000 kilometers. Do you need to clean the throttle nozzle?

My friend's Roewe e950 car has run more than 30,000 kilometers, and it needs maintenance again. Do you need anything besides changing the oil? Do you need to clean the throttle nozzle? What other maintenance items must be done? My friend's Roewe e950 (check the transaction price | model details) has run more than 30,000 kilometers and needs maintenance again. Do you need anything besides changing the oil? Do you need to clean the throttle nozzle? What other maintenance items must be done? First of all, it is necessary to judge when the throttle needs to be cleaned: all EFI vehicles, as long as the engine is not loaded, slam on the throttle for 3000 rpm in neutral, and then suddenly collect oil. Pay attention to the tachometer pointer at this time! 1. When the pointer quickly drops to 1000 to 1200 rpm, the pointer will pause a little, then drop to about 800 rpm, and the idle speed will be stable. The throttle is completely normal at this time! 2. When the pointer quickly drops to about 800 rpm and stabilizes, the throttle is slightly dirty, but it still doesn't need cleaning, which is basically normal! 3. When the pointer quickly drops below 800 rpm or even 700 rpm, and then slowly rises to about 800 rpm, the idle speed follows from small to large, and the throttle valve is seriously fouled and needs to be cleaned immediately! The car can't accelerate, which is not a big problem. Don't panic. The problem can be solved by the following steps: first, check the sensors around the engine, and the computer can detect the fault code; Second, to detect the gearbox fault code, the computer can detect that the above two steps can be completed by the computer. The third step, according to experience, is also the most important, which is to clean the oil circuit, so that the fuel vehicle will accelerate and be weak, and carbon deposition is inevitable for the fuel vehicle. It is suggested to use the method of maintenance while driving to clean the oil circuit efficiently and conveniently, without hanging bottles or cleaning by hand, which is useless and cannot simulate the running characteristics of the car. You can use Del, Siupu fuel additives, Chi WU Lai and Chengxing Zhiguang fuel additives for cleaning. These are all tested by myself, and they are effective. They can clean up water and carbon deposits, and the effect is good. It is recommended to clean the throttle of the vehicle every 20-30 thousand kilometers. Support the cleaning method, and initialize the throttle after cleaning. If the idle speed of the car is unstable, or the acceleration is weak, because this situation is mostly caused by dirty throttle, it should be cleaned. I suggest cleaning it. It is easy to produce carbon deposition after a long time. Regular cleaning is good for the engine and the cost is not high. Replace the three filters, replace the antifreeze, check the tires and look at the battery. The cost of major maintenance is about 1000 @20 19.