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      03-08-2019, 08:38 AM   #12
cjm41
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Drives: 2010 E92 M3
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Quote:
Originally Posted by BPMSport View Post
People often think that they are running rich because of the smell. Our software does not run any richer than stock, and will be at lambda 1 under idling and part throttle conditions. Read the oxygen sensors or use a tailpipe sniffer and you will see that the mixture is likely spot on, and the smell of being Catless or having a modified exhaust setup is being confused with running rich.
Thanks for the input. I guess it was really just cancelling the secondary cats. It's really surprising how bad it is.
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