I am1.8mtfox 12000km. I just did maintenance and cleaned the air intake system. When the throttle is clean, the idle speed is unstable.

It is impossible not to find out! Go to another 4s shop to find out why. I think it may be the oil circuit and the circuit. Check the spark plug, oil nozzle, ignition wire, gasoline filter, oil pump, ignition coil, throttle and air flow meter. Clean the nozzle and throttle, replace the gasoline filter, and measure the gasoline pressure. Idle oil pressure is about 2.8kpa, and emergency oil pressure is about 3.4kpa. Do not check whether the oil pump is blocked or not and the gasoline quality.