Replaced wideband, works perfect. I think where it's positioned isn't optimal, exposes the sensor element directly to what comes out the turbine, so any spatter of condensation or fuel hits it. We'll see how long this one lasts.
Idle ended up being stuck around 2,000 RPM after a highway pull. I think the IAC is kinda sticky. Gonna clean and lube it. Went back to normal after a couple hard jolts/wiggling it.
Got a decent clip for you:
https://youtu.be/jEqNPKXV0DE