How to solve Volvo 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 only the high-speed jitter is obvious, you can first visually check whether the balance lead block on the wheel rim is lost or whether the wheel hub is obviously deformed. If there are no problems in the above places, you should turn to professional testing equipment, because the subtle deformation of steering rod, suspension and wheel hub is difficult to distinguish with your eyes.