discovery2 emissions

hi still in trouble.
new cat new lamba sensors.
new crankshafy sensor, only fault on textbook.
after reset now running rough and smells gasey but not petrol or sulpher smell.
think now the fuelling trims need resetting, only problem before mot was high lamba readings.
dont know what to do now any body gone with this before, its getting beyound me and dont have the knowleged on the electric side of engines.

many thanks

Does it have pre and post lambda sensors?
What's the Afm readings on testbook?

hi its pre cat lamba sensors.
not sure what the reading was as would not let me look, but changed the maf meter , said it would fly through the emissons.to be fair it goes like hell.
he was suprised when i came back and said the test station said it was worse.
changed cam shaft sensor as was showing fault on text book.

thanks