How to judge the jitter fault of automobile engine

Under normal circumstances, the automobile engine jitter should be stable and regular. If you can clearly feel the recent increase in automobile engine jitter, you should check it. The following are two reasons for automobile engine jitter.

First, when driving, the engine jitter is more serious than normal, and sometimes it can't be started. It may be that the throttle is too dirty, and there is too much carbon deposited in the nozzle 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.

Second, when driving at a certain speed at high speed, the steering wheel can feel obvious jitter or jump, but it is not obvious at low speed. In fact, there are many problems that cause automobile engine 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.