Audi q7 diesel version can't be oiled.

There are many reasons, such as oil circuit, cleaning the nozzle of throttle (or carburetor), replacing the gasoline filter, and checking that the oil pressure (3 atmospheres is enough) is not enough to change the oil pump. The circuit and battery should be fully charged and the spark energy should be sufficient. Whether the ignition high-voltage package has excellent performance, whether the high-voltage line leaks electricity and whether the spark plug gap is normal. In addition, the ignition timing should be accurate, whether the burner can catch up with the burner and whether the air filter element is blocked.