Today I will share with you a failure case, the protagonist is 15, 16, 17 years Buick Yinglang, it is equipped with a four-cylinder engine with a displacement of 1.5, there are two main common problems, one is resonance and one is high idle, basically fixed at about 950 rpm!
Let’s take a look at the owner’s description of the failure,
According to the owner, when parking idling p gear and other red lights, feel the engine vibration obviously, especially in the cab feel very obvious, and you will also hear a humming sound, similar to engine resonance!
Another fault is that the fuel consumption has been particularly high recently, and the engine speed pointer will be close to 1000 rpm after the hot car, and the idle speed is high! When the engine is driving at low speed, when the automatic transmission car changes gears in one, two and three gears, especially the second gear, whether it is upshifting or downshifting, it will obviously feel the feeling of dragging, and it feels that the gear jump is very discordant, what is the problem?
The faults described above are all common faults of the car, and the first fault is
The resonance caused by the engine and transmission mats, this only needs to replace the mats!
For the second too high idling problem is due to:
Caused by the failure of the current sensor of the negative electrode of the battery, only need to replace this current sensor
！ After this fault occurs, the battery is cut off to reset the computer, and the fault may be displayed, but the fault will appear again after a while, and only by replacing the current sensor of the negative pole of the battery can solve the fault!