What is the reason why Jing Rui's cold motives are a bit untenable?

In general, the jitter of automobile engine should be stable and regular. If you can clearly feel the recent shaking of the car, you should check it. 1. Improvement of hot car when idling in the morning: When parking in the morning, the engine jitter is more serious than normal, and sometimes there is a problem that it cannot be started. Cause: It may be that the throttle is too dirty and there is too much carbon deposited in the injector and air intake. 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. Solution: Clean the throttle, fuel injector and air inlet. But consumers should be reminded that the cleaning work can be done step by step. Wash the throttle first and see if it improves. If it is good, there is no need to clean the remaining two items to avoid wasting more money. 2. High-speed jitter or jumping phenomenon: When driving at a certain speed at high speed, the steering wheel can feel obvious jitter or jumping, but it is not obvious at low speed. Reason: In fact, there are many problems that cause car jitter. First of all, we should eliminate the abnormal jitter caused by engine failure, because engine failure usually occurs at low speed. If the car only shakes obviously at high speed, we can first visually check whether the balance lead block on the rim is lost or whether the hub is obviously deformed. If there are no problems in the above places, it is necessary to turn to professional testing equipment, because the subtle deformation of steering rod, suspension and wheel hub is difficult for us to distinguish with the naked eye. Solution: After the automobile is used for a period of time, the suspension, shock absorber and wheel hub are unexpectedly deformed or the ball head and tires are irregularly worn due to collision, frequent going up and down or not slowing down after crossing the pit. Basically, the solution can be solved by adjusting the suspension position of the chassis, toe angle or replacing the tires.