Yeah. Plenum is clean as a whistle. Plugs 4 and 8 if seen in person were starting to blister. I changed the plugs to Autolites 5224 to no avail with issue. I don't have access to a scanner. I'm starting to wonder about the computer.

Charging system and battery are good.
All sensors are good
Injectors are good
Fuel pump and regulator are operating correctly
No exhaust leaks (all brand new)

 

How old/what brand are your O2 sensors?