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exhaust leak

  1. INPA Lean Bank 2

    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...