I've been chasing an exhaust leak in my truck for months now. I can hear it, and I can smell it (when I'm sitting at a stoplight), but I just can't seem to actually see anything, what with all of the hoses and tubes and what-not in the engine compartment. I'm getting an overrich code on my scan tool, and when I pulled my O2 sensor last night it was all sooted-up. Again.
So I replaced it. Again.
Anyway, it should be here on Friday, so we'll see.
Wish me luck!