Originally Posted by jippii ensio
+1 for looking at both of the banks. If only one is running lean, you could have accidentally swapped the o2 sensors in your DPs. Or as Ilma said, you could have a bad injector.
If he swapped front o2 sensors his car would be undrivable. If he swapped rear o2 sensors it would throw an SES light along with a code for swapped sensors, but would not affect trims the way the OP is seeing. He also did not appear to have these issues with his old JB4, which rules out hardware.