What happened when Chery A5 was idling at high speed and low speed? Ask for an answer!

First, check the carbon deposition of throttle body, idle valve, air inlet and fuel injector. Excessive carbon deposition will lead to unstable idle speed, difficult start-up or flameout during driving. The working condition of idle valve is also very important, and the idle valve of vehicles with long mileage is prone to failure. Secondly, it is important to check the working conditions of spark plugs and ignition coils. Poor ignition system can also lead to unstable idle speed. Spark plugs need to be replaced every 30 thousand kilometers, and then there is the failure of the electronic control system. The normal operation of electronically controlled engine needs to collect the information of each sensor, and inaccurate sensor signals will also lead to idling jitter or flameout of the engine while driving. This kind of fault needs a comprehensive inspection.