You will need to do this by syphoning from the Fuel Return Line connected to the Injection Pump
1. Disconnect the fuel return line from the injection pump(It is sticking up from the top of the pump)
2. Using some sort of pump, connected to the line, syphon the liguid into a large container like 5 gallon capacity
3. Continue step 2 untill you see Diesel Fuel flowing constantly
4. Connect the Fuel Return Line to the Injection Pump and start the engine and let run(keep in mind, what ever was in the tank is still in the lines..give it a minute ir so)
If your car is equipped with a Water In fuel Seperator...open the valve with engine running to get it out of the fuel tank lines.