I know, it looks bad, although the forums get plenty of views its just the participation that is lacking at the moment.
Did a quick search (within the forum search bar) for 3.0TDI problems and mapping....hopefully some useful info in amongst them
https://www.audiownersclub.com/search/?&q=3.0tdi problems&search_and_or=or&sortby=relevancy
https://www.audiownersclub.com/search/?&q=3.0 tdi mapping&search_and_or=or&sortby=relevancy