After replacing two machine pads, Wuling Glory van found that the car resonated at idle speed, and the steering wheel under the driver's feet vibrated seriously. What's the problem?

There are many reasons for idling jitter, and the common ones are:

circuit

The throttle body is too dirty or fails by itself;

Related sensor failures: such as water temperature, air intake and other related sensors;

Poor contact or poor conduction of ignition coil (according to emission);

Caused by abnormal ignition circuit;

One or more conditions such as ignition coil failure and combustion. (by emissions);

Abnormal stepping motor;

Spark plug failure: such as incorrect calorific value, wrong model or need to be replaced;

The related control circuit is partially abnormal;

Abnormal anti-theft system;

fuel oil

The fuel quality is not up to standard. For example, the quality of fuel, high water content in fuel, many impurities and so on. , resulting in abnormal engine condition jitter.

Oil pressure fault, abnormal oil pressure;

Electronic oil pump failure, poor conduction or abnormal heating work;

Impurities in the oil pipeline are blocked; For example, the gasoline filter element is blocked or there are many foreign substances and impurities, and the oil supply is not smooth, and the fuel pipeline is blocked, broken, rusted or deformed (scraped or collided), resulting in poor oil supply.

Fuel filter failure, such as blockage or long-term non-replacement;

Fuel injector failure, such as poor atomization, blockage or self-quality reasons;

Fuel rail pressure sensor failure;

engine

Excessive carbon deposition in the engine;

Internal wear or improper maintenance (or overdue);

Abnormal cylinder pressure;

The selected engine oil is incorrect or the viscosity does not meet the standard;

Individual parts are worn or damaged;

Abnormal valves, such as sticking and air leakage.

The water temperature is abnormal, and there is something wrong with the water temperature sensor circuit and the sensor itself.

The specific fault is subject to the test results of the real vehicle. If a fault is found, it should be repaired in time to ensure that the fault can be solved in time and not spread, so as to ensure the normal operation of the vehicle under various working conditions.