What should I do if the fuel injector, air inlet and throttle are washed and the idle speed is unstable?

According to your car condition and maintenance brief description, according to the summary of Ford Focus's after-sales maintenance experience, the nozzle and air intake system of this model are often cleaned, mainly due to the technical control and fuel quality of the vehicle. In view of this situation, Beijing's maintenance method is to use combustion chamber cleaning, that is, to use special cleaning agents and special tools for maintenance, and the effect is relatively good. As for the failure of your vehicle exhaust system, it is also the case of most vehicles at present, that is, the engine combustion conditions are relatively sufficient and the vehicle driving environment is caused. This fault will be more obvious if the vehicle travels a short distance in low temperature every day. The best maintenance method, I suggest you go to a franchise store to maintain the lowest point of the muffler at the end of the vehicle exhaust system, and process a small hole with a drill to facilitate the discharge of accumulated water in the exhaust and prolong the service life of the exhaust pipe.

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