Problem with high emission

Problem with high emission. Can not pass test

Car works just fine. Revs upp with no problem. Idling is just fine and stable

Can not find any leaks with startergas or smoke EXCEPT when introducing smoke from the airinlet into the ERG valve. Then there is some smoke comming from the "piston" connecting to the ERG membrane. Normal or not normal ??

ERG valve before cleaning

ERG valve berfore cleaning

Intake manifold

The MAF sensor

Turbo and ERG valve

Some oil leaking from the turbo oil inlet

ERG valve. leaking fom the piston