Well, drove it to work again...

...plus to the Y and back during lunch, and just now got back from AutoZone. No fuel leaks. The annoying exhaust leak at the passenger header is back. I got some exhaust bolt springs at AutoZone, I'll try to get them on tonight and hopefully solve that leak once and for all. Then I can listen for leaks elsewhere and get rid of all the weird O2 readings.

Car's a dog again. It was kind of peppy the other night, but it's not feeling quite as spunky today. Then again, it's 20 degrees warmer than it was the other night, so that may have a lot to do with it. I also may have an ignition miss. Again. Fucking cars...