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Thanks for all responses, been on vacation...^^^^exactly what it smells like.

It's a lot better since STEEDA revised map (cat temp control). But the odor has not gone away completely. Not worried...car runs fine under normal driving conditions.

Car is daily driven 200+ miles a day with at least one-two 120+mph runs :yup:.

Trying to decide whether to keep it or dump it.
Why would you get rid of it instead of trying to fix the problem?

Ask the tuner if they will accept a datalog of a WOT run to try and dial in the tune a little better.
 
Old school analysis:

The described odor used to be common when catalytic converters just came out, and usually occurred during cold starting, and older cars after hot running. These were carb-era cars and the smell was undoubtedly due to inefficient fuel delivery with fuel not completely burned in the engine and forming deposits on the converter.

You've described long idling, lots of daily driving and a custom tune followed by Autobahn speeds. I suspect the tune may be the cause.
 
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