I have done some new mods so I just finished up a fresh tune, 324hp at the four wheels form my hnu13 sr20det

enyway with oxygen is turned off or unplugged afr are very close to target afr ,when I plugged oxygen sensor back in ( skinny o2 titania type) It started to f@#k things up, it started leaning out far to much it low load and idle like down to 16.5afr car gets a bit jumpy and ruff.
so I would like to use my lc1's yellow wire to ecu but I carnt find the volt output of the skinny titania sensor
I have watch my stock(maybe broken)sensor reading .39v-1.39v inside nistune
0.1v-1.1v for the fatty
?.?v-?.?v for the skinny
can someone please help