Quote:
Originally Posted by PencilGeek
AFR from a tailpipe sniffer...right? You didn't actually measure before the cats...did you (somewhat rhetorical question because the M3 doesn't have a bolt-on place to measure AFR before the cats).
What good is measuring AFR from a tail pipe after two sets of cats, and after the ECU already compensated for what it found in the O2 sensors? Seriously, those measurements are practically meaningless. Comparing it to some other tailpipe results doesn't mean much either.
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Are you saying that tailpipe sniffers are pointless and play no role?