Mate....
I cannot find your thread anymore but you were baffled by what this lift needle sensor is and as I mentioned, it is built into injector 3...
This is what you need to replace.....
http://www.ebay.co.uk/itm/AUDI-A4-A6-QU ... 1c33e4fab2
Hope this message finds you!
Thanks,
J
Message for the guy selling the A4 Avant 2.5 v6 tdi
Moderators: water01, desertstorm, vwnutant