update: changed only the passenger 02 sensor, since I could not get the old one off even after letting pb blaster soak all night. I gave up and paid a gas station $40 to get it off for me and put the new one in. Driver's side can wait until I get a code for that one

Also changed the drivers side knock sensor.

Truck is running well. There is no smoke and idle is back to normal. let's hope this lasts for a while. my average time between "issues" is 6 weeks. I'd love to make it through winter with only an oil change