finally go my smokey audi to a none smokey audi
after a trip down the motorway with black smoke coming from the exhaust
and coming on this forum to ask the question on what and why ?
ERG clogged up / CLEANED
MANIFOLD INLET clogged up / CLEANED
found on split in air intake pipe fixed
still found slight black smoke still coming from exhaust and small power loss
but after a new disc and pads exchange on front wheels noticed pipe from intercooler leaking .
after refitting and tightening clips the smoke has completly gone and the power is fully back .
thanks to all that helped