OK, running Cobb AP stage 2 ots map. Everything has been smooth driving tell lastnight. Soon as I started my car, dropped a cel right away, so I took it easy on the way home and now my a/f gauge is reading a solid 10 at idle and is all over the place when crusin... I'm to afraid to wot ...po171 & po134. Checked for leaks, nada. My question is,if my stock o2 went bad or dirty "po134"could it cause my car to run lean and pull "po171" and then max out my fuel tables so i running soo rich? My a/f gauge only goes down to 10 and it just sits there when idling. Im resetting the ecu now. Should I pull o2 and maf and clean them? Does any of this make since ?**I'm just an amateur enthusiast taking a guess and the title says it all ... ID 10 T= IDIOT*__________________all checked vacuum line next to dip stick btw...siltier

 

I reset Ecu and cleaned both stock o2 sensor and the maf was clean as could be, and right after I start up and idle the uego reads 11.4 or so. I drove it around and it dropped down to 10.3 or so at idle. Let it sit for 5min and crawled back up to 12.5 or so at idle. So do you think it could be a bad o2 sensor ? Codes I pulled before reset po134 and po171 and they have not Come back in the last 10miles

 

Bueller.... bueller.... bueller? Anyone have an idea what route i should go? Just start replacing o2 sensors . I've also misplaced my Cobb AP so i can't reset to stock.

 

^ you need to find your AP so you can reset it back to stock...