Old Mondeo cleaned the injector and throttle. What if the idle speed is high?

Focus on checking the working condition of the idle valve and whether the air intake system leaks. First, clean the throttle body and idle valve. If the idle speed is still high after cleaning up the carbon deposit, it is necessary to check the sealing of the throttle body and the sealing of the intake pipe. I suggest you go to the 4s shop for maintenance in time. High idle speed will lead to increased fuel consumption. I hope my answer is helpful to you.