Case Analysis And Explanation

In addition to carbon deposition, the increasing vehicle wobble may be caused by the aging of 6 parts.

As the vehicle mileage rises, the fuel consumption may be increasing, the power will become weaker, and even the noise will become larger and larger due to carbon deposition, aging and wear. All these are common. However, the vehicle may increasingly wobble. In this case, we may think of carbon deposition. The carbon deposition of the engine will make the vehicle wobble indeed. For example, carbon deposition at the throttle valve will aggravate the vehicle wobble during idling and the carbon deposition at the fuel spray nozzle will make the vehicle wobble during traveling. However, in addition to carbon deposition, the aging of the six parts below will also aggravate the vehicle wobble.

I. Spark plug
Spark plug is a typical quick-wear part with limited service life and also subjected to the carbon deposition prematurely. Under normal circumstances, the service life of ordinary copper-core spark plug is 30-50 thousand km, the service life of platinum spark plug is 60-80 thousand km and the service life of iraurita spark plug is a little longer, reaching more than 80 thousand km. The spark plug shall be cleaned in the common use if a large amount of carbon is deposited on the spark plug. Otherwise, the vehicle will wobble.
Spark plug cleaning
If the spark plug is at poor state, or its service life is expired, the engine will have regular and severe wobble, and even vehicle shock. The spark plug fault is one cause of increasing vehicle wobble.

II. Ignition coil
The ignition coil also has a service life, and it will be aged after used for a long time, and it will be easy to be damaged when it is aged. Although the ignition coil can generally be used for more than 100,000 kilometers and has a long service life, it may be broken at any time after being used for 100,000 kilometers.
Similar to the spark plug fault, the ignition coil fault will also cause the failure of cylinder to work properly and lead to the missing operating-cylinders symptoms such as intermittent wobble. Consequently, the vehicle will have severe wobble.

III. Brake disc
The brake disc generally has a relatively stable service life of 80,000 to 120,000 km, and its service life is much longer than that of the brake pad. However, it is easy to have a deep gully, so it should be checked. When the service life of the brake disc is expired, it will vibrate violently during brake, the body will wobble accordingly and the vehicle will become uncomfortable.
If the poor-quality brake pad is used, the service life of the brake disc will be greatly reduced. We should also pay attention to this when we use the vehicles ordinarily.

IV. Engine support rubber pad (engine foot pad)
The engine is connected to the vehicle body. The engine support rubber pad functions as buffering and shock absorption, and is used to absorb the shock energy. However, the engine support rubber pad is a rubber part and will be aged. It will be hardened after aged and will be easily damaged.
Once the engine support rubber pad is aged, the vehicle will have severe wobbles when traveling. In addition, the sympathetic vibration will easily occur to cause violent vibration and noise in the vehicle body. The engine support rubber pad shall be timely replaced if aged.

V. Fuel filter
The fuel filter is one of the “three filters” for routine maintenance of the vehicle, but the fuel filter has a long maintenance cycle , so it will be easily neglected. When the service life of the fuel filter is expired, it will be blocked by various impurities, and the oil way will be blocked. As a result, the relevant symptoms such as wobble will appear.

VI. Front oxygen sensor
Many sensor failures will cause vehicle wobble, such as water temperature sensor and air flow meter. So, why is the front oxygen sensor listed separately? Because the front oxygen sensor is installed on the exhaust pipe where the working environment is rather harsh. The carbon deposits are inevitably mixed in the exhaust gas, which will be increasingly attached to the front oxygen sensor.
Because the working environment of the front oxygen sensor is relatively harsh, the problem of sensitivity reduction is more likely to occur, i.e., the front oxygen sensor is more easily aged. When there is a problem with the front oxygen sensor, the ECU cannot accurately control the fuel injection amount, causing the engine mixed gas to be out of proportion. The engine will wobble due to insufficient combustion of the mixed gas consequently.