Is it normal for Cruze accelerator to have carbon deposits?

1 cruze 1.6 the reason for the unstable idle speed in cold start is that the engine works at low speed for a long time, which will cause insufficient combustion, some parts will have carbon deposits, and some parts will be pasted by sticky oil stains that are not completely burned, further causing insufficient combustion and a vicious circle. It is recommended to clean the throttle and idle motor and check the spark plug.

2, 2000 shift gear is the lower limit, generally should be in 2500-3000, depending on the engine.

A simple way to measure the shift speed is to drive in second gear (or third gear) first, and you can definitely find a gear. At this time, the throttle is the most sensitive. As soon as you step on the throttle, the car will move forward. Remember the speed at this time. Low speed and high gear will make the engine unable to work normally, and insufficient combustion will cause carbon deposition, pollute the EFI system and even block the fuel injector, which will interfere with the normal work of the on-board computer.