What is the vibration of the Big Dipper x5 engine?

In this paper, the common causes of engine jitter of the Big Dipper x5 are listed for reference:

1, air intake system failure. A, the throttle is dirty, resulting in low idle speed. More common faults, clean the throttle in time. B, idle motor or throttle position sensor failure. Replace throttle position sensor or idle motor. The idling of the motor is mainly caused by excessive carbon deposition, which can be cleaned, but it can only be replaced if the carbon deposition is serious. C, air flow meter feedback information error. Feedback the sensor of engine intake and check the air flow meter. D, waste recycling (EGR) valve failure. Adjust or replace EGR valve. E, air leakage in the intake pipe or intake manifold. Replace related parts. Engine valve timing error. Valve timing mainly controls the opening time of intake valve and exhaust valve, and adjusts the valve timing of the engine.

2. Exhaust system failure. The oxygen sensor is faulty. The oxygen sensor feeds back the air-fuel ratio signal to the engine. Failure may lead to inaccurate fuel injection and engine jitter. B, three-way catalytic converter blocked. Three-way catalytic converter is a device for purifying waste gas. The blockage of three-way catalytic converter will not only make the engine shake, but also lead to the obvious decrease of engine power.