Audi 2.0 tdi fuel injectors -measuring blocks

Gents,

I had my car (2007 Audi A6 2.0tdi BRE) scanned using an official VCDS system and in particular the measuring blocks for the fuel injectors and the results were as follows.

Group 13 Idle stabalization (Injector Quantity Deviation)
-3.01 mg/str cyl 1
2.99 mg/str cyl 2
2.99 mg/str cyl 3
-3.01 mg/str cyl 4

The car went belly up a few weeks ago and was diagnosed by Audi as Diesel leeking into the engine oil via the injector seal. This then took the turbo seals out so I have replaced the injector seals and fitted a new turbo but now the car is running extremely rough at tick over and need to know if these values point to injector trouble.

Cheers