No need to delete the thread. It will help someone else down the line.

Remove the air filter element. Sometimes an oil bath can restrict air flow until the oil becomes a film on the filter element. Also make sure all air passages from the beginning all the way to the intake are free from obstruction. Does this car have an EGR? Check the intake for exessive carbon buildup. This will restrict air flow as well.

Have you done a valve adjustment yet? valves that are too tight do not close fully, resulting in incomplete combustion.

Our new TDI has no problem belching black smoke under WOT. Also every TDI that I have seen has the sooty bumper. Funny how my MB does not, and it has no problem sending a nice grey fog at WOT either.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D