My crankcase venting system is routed as follows: both vents are linked to a T that feeds into an oil catch can, and the output of the catch can is then introduced into the intake after the maf and before the turbo.
I will hunt for a vacuume leak too.
If in fact it is all pcm related, is that something i can expect to be sorted out by a quality tuner?
Also, noticed another drivability quirk today on the way home from work. At steady state operation, the car will surge very slightly and if i glance at the AFR gauge, the AFR will have jumped to mid 15s or higher only to settle back again to oscillate around 14.5-15.1 approx 5 seconds later.