1. Smoke, if the pump has just begun to run a smoke phenomenon, is normal, if the smoke is not normal for a long time. The solution: smoke shows the pump inlet, including pipes, valves, containers are repaired. Leakage after treatment, the smoke will end. Vortex flowmeter 2. Fuel injection, indicating a large number of leaks outside the air intake, or even the air inlet exposure to the atmosphere. Solution: seal the pump inlet to run the pump, if not fuel injection, indicating a leak; exhaust valve damage, check the exhaust valve is damaged, replace the bad exhaust valve.