JDMGhosteg-6

I hope somebody can help me out. I have a 92 hatch back with 94 Ls motor with a dx wire harness. My car smells like it is running very rich. When I floor it in first to second gear its fine but once I get out of third to go to fourth it boggs. It seams like it gets too much fuel and I lose power. I know that one of my o2 sensors is not connceted beacuse it is a 4 wire sensor. Is there any thing I can do to hook up that other o2 sensor with the wire harness I have now or can I just change the settings on the computer with urdata?

Thanks in advance!