Ask the gods for help about ATSL and idle jitter.

1. When the engine oil and engine idle speed change, the fuel injection quantity may change, which will inevitably lead to the fluctuation of engine speed, and there are many reasons for the jitter, such as the failure of the oil pump oil pressure regulating mechanism or sensor, which leads to the failure of the fuel injection quantity correction signal.

2. qi. The first is the idle bypass valve. This problem will occur if the idle motor fails or the air inlet is blocked by carbon deposits or other pollutants, and the bypass valve is not properly ventilated at idle speed. Judging from what the landlord said, the problem often appears in the "gas" item, because if there is a problem with the "oil", the general fault light will call the police.

Other common mechanical failures can lead to air intake problems:

1. The vacuum booster tube is broken,

2 oxygen sensor surface area carbon

3 Throttle carbon deposit or dirt, or the position of throttle position sensor is wrong (the diagnostic instrument should be able to print it out).