disco 2 v8 emissions

hi chnaged the camshaft sensor as on text book showing fault.
i think the the engineer did a adaptive reset.
fuelling all over the place.
does it take time for the ecu to learn fueling again, or can the trims be set on text book.
at a loss now new plugs .new airmass sensor.
new camshaft sensor.
2x lamba sensors.
new cat.
to me smells rich but not petrol or sulver smell.
what to do next ,not sure.
many thanks for your help

Is it on gas ?

hi no petrol only.
been ok for a year then this mot emissions where out, just on lamba.
co no problem, now all over the place.
many thanks

If it is out on lambda then you have a air leak into the exhaust.
Does it have secondary air injection?

sorry been away for a week.
no does not have secoundery injection .
thanks

hi sorry.
had new manifold gaskets last year ,and new manifold to drop pipe exhaust gasket just fitted.
trying to think where it may be pulling air in .

thanks

What readings are you getting with textbook with regards to emissions?

Not sure as the garage wouldn't letme see them
Just cancelled faults and that was it
Thanks

Just clearing the faults won't help neither will them not telling you what the emissions are too ask them for the details