Why does Ford Wingbeat suv appear the phenomenon of car noise jitter at the beginning?

The biggest possibility is that the throttle is too dirty and there is too much carbon deposited in the nozzle and air inlet. In the case of cold car, the carbon deposit will adsorb some fuel. If the fuel does not completely enter the cylinder for combustion, it will cause the symptoms of unstable idle speed and difficult start. It should be noted that when cleaning the throttle, you can't just clean the throttle. The throttle idle valve must be disassembled and cleaned, and the bearing of the idle valve must be lubricated.

In addition, due to the long-term use and aging of the spark plug, the gap between the two poles is easy to widen and enlarge, resulting in insufficient ignition energy and gasoline atomization effect, and the car will shake. Now many cars are three-cylinder and four-cylinder cars, and each cylinder has a spark plug. These spark plugs also have the phenomenon that the gap becomes larger, which makes the power of each cylinder body different, leading to car jitter.

The specific motor vehicle jitter needs specific analysis.