Weird o2 Sensor Behavior on Newly Boosted 09 370z

jarenbea

I supercharged my 370 recently and have had some issues tuning it due to poor upstream o2 (afr) sensor readings. The sensors are fine at idle, returning values in the low 2V range however, when moderate throttle is applied the readings drop to 0V in both banks (usually staying at 0 until I let off the throttle). The car also hesitates when this happens.

I will get power for a split second, lose it all, and repeat until I let off the throttle. In an attempt to fix this I have been through multiple o2 sensors (yes they’re oem) and have tried extending the wires in a couple different ways so that they can reach the sensor on my ppe long tubes (first nisformance, second 18ga copper wire and butt connectors, and now 18ga tinned copper wire that is soldered to extend the connector in the engine bay). I have seen the exact same behavior in all these instances.

Tuner advised me to check out mafs/map, plugs, injectors, and boost leaks. Plugs were checked and all three sensors were cleaned but still no luck. I will be getting the injectors and boost leak checks done soon but i highly doubt they’re the issue because all these components are brand new.

Just wondering if anyone else has dealt with this issue and has figured it out. I would be eternally grateful if you solve my problem for me haha!

Edit: Ot was my fault originally I believe due to improper sensor extension but after soldering tuner fixed the issue with a revision.