Car running lean after drilling out precats

Hi guys i am brand new to these forums. I have searched and found no answer to my problem so i am hoping u guys may have some brilliance! thanks!

so Yesterday i decided to drill out my precats since i had the exhaust removed for new seals in my transfercase. today i got everything together and now i run lean at idle 15.5-16.5 to 1. Im sure im getting much more air now with them removed but wouldn't the computer adjust for this? I have reset the ECU with no change. I also upped my fuel pressure to 45 psi.

I know my car has been running lean since i just pulled a plug and it was pure white. My computer seems to think im running rich though as it has the low trim at around 81 and the middle at 90. The high usually stays around 100.

Could dust from drilling out the precats have gotten in the O2 and ruined it? I saw it up there above the rear precat but i got no where close to it with the drill.

My mods are, Test pipe,removed precats, WB AFRG, AFPR, Super mega flow intake, and hotwired walbro.

Delete this thread as your other is the same, and will get all info in one place without confusion.