My car is an 07 1.8 (lynx) tdci mk4, 162,000 mls. Much work done over lockdown, which included a change of injectors, done properly at a garage, and properly coded. The problem, I'm still black smoking at 2000+ revs, as in pulling away from lights or junctions .This was also happening before the change. If I drop a cog and accelerate, black smoke. If I short shift, keep revs below 2k, no issue. By the way and not linked, DMF & clutch have also been changed. Ladies & Gentlemen your mission, if you wish to accept, is to hazard a guess, or using your best brain power, provide me and others with some possible solutions. I thank you in advance, just for looking at this issue.