17 Toyota Lei Ling 1.2T refueling is not smooth, the power is insufficient, and the idle speed is unstable.

Hello, if the idle speed of the vehicle is unstable and fluctuates, this situation is mostly due to the increase of carbon deposition in the throttle valve, which affects the intake of the engine, or the gap between spark plugs is too large and the ignition performance is poor, which may also be caused by poor gasoline products. You can replace the new fuel first. If the idle speed is still unstable, you need to go to the repair shop to check the throttle and spark plug. If necessary, you need to clean the throttle and replace it with a new spark plug.