Misfire/white smoke please help :(

[turbo_scotty]

my 3.0tdi 05 a8 has developed a heavey misfire on idle if you rev is you can clear it and it smokes badly also (white) everything lead to injectors .

I've recently changed injectors myself coded ect via vag com but still no joy no fault codes

Only think I have noticed since I changed em is that group 72-77 won't give me any sort of reading ..... I.e all sit on 0.0 does this mean I've done something wrong ?

Group 13-14 still give me a reading

I just want to fix this now as it's starting to cost me a few ££££££ and only owned it 3 weeks

Any ideas what elce it could be as the injectors where removed from a fully working car any help would be great cheers Scott