Title explains it - black soot coating the garage and driveway - only on startup. I've read threads in other places - most that it's "running rich" or "this is normal" - but we had a 50 and this 51 growing up - never had the issue with the 50. And it's just .. a lot. The car runs a bit rough when cold, but when it warms, it's perfect. My high level question: If this is the same muffler/exhaust that's been on the car for 20+ years - is it possible it's just lined with soot and replacing would rectify? I have zero issues once this car is warm - but the mess at startup bugs me. Thanks.
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