So i just finished up my turbo project and i had to ride around for a day with my O2 plugged in but ziptied down diddnt drive too well but the next day i put a downpipe on it and plugged in the O2 drives great untill like 5K it completely leans out to where my apexi turbo timer wont register that lean and it like shudders and wont rev any higher CEL says 1 but how can i fix that. Would it make the motor shut down like that? im sure its not the O2 thats bad cuz im reading A/F ratios through my turbo timer. Ive searched but cant find anything please help.

 

Cell 1 is for sure you primary oxegen sensor.

it could make your care run that way depending on how your tuned. closed loop. open loop, etc...

what type of engine management are you using?
how old is the O2 sensor?

platinum.