Hi ,
I know this thread is two years old.
However im having the same issue with my lux.
Black smoke when accelerating, Otherwise clean at idle.
There is a Unichip and K&N Filter installed. I disabled both the chip and reinstalled existing paper filter.I have also tried adding fuel additives for fuel system clean and injector clean.STILL SMOKE!
I spoke with diesel experts who keep persisting its the chip, My local mechanic blamed it on poor quality fuel and
my air filter.
What should i do from here? I was thinking to get the egr system cleaned and injectors inspected , am i heading in the right direction.
Thanks
Dennis