Hi guys please help if you can i have a AEB 1.8t 1998 a6 avant which is not boosting at all i thought it was a little slow when i bought it so changed the divert valve, with no effect then checked the turbo which seems to spin freely so not seized even checked when engine running, so i have fitted a digital boost gauge which shows -6 on idle then goes to 0 when driving then back to -6 when i lift off, there is no noise at all from the turbo or smoke from the rear and I'm stuck for ideas apart from changing the turbo please help

 

post up or search in the A4 section... you won't find another A6 1.8t in here =/