2006 Other Vauxhall Models flooded engine

Engine Performance problem
2006 Other Vauxhall Models 4 cyl Wheel Drive Type unknown Manual 10000 miles

I baught a flooded diesel vauxhall combo van. Easy to start but brings out white smoke, I drove it for more than 100miles, runs well but missfires yu can feel it wants to go but its being choked. The diesel in the tank is fine, I had the injectors tested & they are fine.

I thought if its water it was going to clear after a long drive but this has not hapened. Please help. I have no money to buy another engine.