rx7turbo287

Have a K20a swap, hybrid racing harness in 97 ek. Using 234-9005 o2 rsx type S o2, plug into the 4pin plug on hybrid racing harness, kpro is reading the o2 strange, on idea is around 27:1 to 23:1, when driving around is 32:1 on some wot, let off the gas is jump to 16:1 but bounce back to around 20s, can is not tune and running base map, but it does not feel like running that lean, it feel like driving stock untune rsx. The voltage on idle is around 0.00-0.09 driving around 0.32v checked the wiring and is correct. Any input? The o2 is brand new, when first start in 30sexond o2 doesn't respond. Then start reading after that