2005 Trailblazer removed catalytic, how important is it to replace air to fuel sensor?

Question

Pit straight pipe in replacement of catalytic converter. Misfire on 5 and misfire on 1. Not at the same time on the misfires, replaced coil packs and plugs then misfire on 1 happened. Go thru fuel like crazy and last week felt like the truck was in limp mode.... what effect would not be changing the air to fuel sensor have

Answer 1

I have seen clogged Catalytic Converters causing an engine misfire, but I have not seen Air/Fuel Ratio Sensors causing an engine misfire. Your next step is to check for leaking fuel injectors.