What is the reason for Kia k2 idling up and down?

The reasons for the high and low idle speed of Kia k2 are as follows: 1. The main reason is that there is too much carbon in the throttle, which leads to a small air intake, so it is necessary to go to the repair shop to clean the throttle. 2. The fuel injector in the fuel supply has poor atomization, resulting in poor combustion, so it is necessary to check the EFI system. The following is the cleaning operation flow of automobile fuel system: 1. Open the fuel tank cover, take out the filter cartridge, pump out most of the fuel in the fuel tank with a hose, leaving fuel with a depth of about 10~ 15 cm, add 80ml ethanol gasoline to replace the cleaning agent, install the filter cartridge, and cover the fuel tank cover. 2. Dismantle the oil inlet and oil return pipe of the engine, connect it with the oil inlet and oil return pipe of the disassembly-free cleaning machine, and connect it with a special interface to form a loop. 3. According to the scale of the oil storage tank of the disassembly-free cleaning machine or the number of engine cylinders (per cylinder 100ml gasoline), add gasoline to the cleaning agent storage tank, and add 100ml ethanol gasoline to replace the cleaning agent. 4. Adjust the pressure according to the vehicle type. Only the carburetor truck can adjust the appropriate pressure, and the EFI truck can adjust 2-3 pressures. 5. Start the engine, check whether there is oil leakage in the oil inlet and return pipes, clean at idle speed 15-20 minutes, and increase the throttle every 3-5 minutes, so that the cleaned carbon deposit and moisture can be discharged from the exhaust pipe. 6. Remove the disassembly-free cleaning machine and the oil inlet and return pipes of the engine, restore the oil circuit of the automobile, and start the automobile to check whether the oil pipe leaks oil.