Update
It was 60 in Charlotte yesterday (finally) and I got the 2000 'S' out and drove it hard. When I pull in the garage my catalytic converters are ping and popping like normal and I have a very small odor too and I'm sure it is the converts, I've had it since I bought the car and just got used to it. The odor is not new to me, I remember a lot of cars in the 90s I've had were like this too.
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