E39 M5 and E52 Z8 Discussion
I've been hunting this for about 4 months when I started noticing more soot on bank 2's exhaust tips.
INPA readout remains this way, even after swapping the MAF with bank1 (adaptations reset in between swaps).
MAFs (029 Bosc) < 1 year old
Pre-Cat O2 < 1 year old
This doesn't seem like a...