d9022, Have you got access to an injector test pump? they should pop off at around 140/150 atmospheres and give a good spray pattern. You could try advancing the pump timing if it is black smoke, be sure to slacken the injector pipes and move the pump around about 1mm at a time anticlockwise.
Any body know the reasoning behind that.Your spray pattern should be slightly offset from centre, so that's nothing to worry about.
From what James has told us 150 is high, mine seems to run OK at 140.
I am unsure on white smoke to give any thoughts re pump timing, white smoke is usually sign of head gasket problems. Maybe James will advise.
If you do change the gasket remove the injectors and re torque after warm up and again after 500 or so miles. A pain I know but if not done they can blow around pushrod area.
Any body know the reasoning behind that.