A Isuzu vehicle with a mileage of about 16000KM suddenly extinguished itself. There is no diesel in the injection pump when the parking check is checked. When the air in the fuel injection pump is removed by hand oil pump oil, the engine can start, but the car only travels about 200 meters, and the engine is self extinguishing. When the intake pipe on the fuel injection pump is removed, a flue gas is emitted from the pump cavity.