In Reply to: Black Soot on rear bumper = bad AFM????? posted by Erik Brannfors - Seattle M3 on June 01, 2002 at 12:02:08:
Noticing that after a week there is a buildup of soot on the rear bumper from the exhaust. I have searched the archives and saw that some have indivated that a b ad AFM causes this. Can I adjust it? Do I pop the cover and clean the carbon off the track under the sweeping needle? Do I adjust the screw under the "tamper proof" blue plug?
Or bite the bullet and spend $1000 on a Split Second Gen 2 MAF kit!!!! Yeah......