What’s going on when you floor it for a minute or two and your cat gives off that hot cat smell. Also noticed when the driver ahead of you floors it to haul buggy around a slow driver.
Some of it seems to be a hint of sulfur, that makes sense to me since the engine will be in open loop and running rich. What’s the rest? Are deposits in the cat burning off?
2010 Ford Fusion SE 3.0L V6, 175k miles M1 AFE 0w-20