I just went and did some datalogging. Here are the results I came up with. Are these values even possible? I have never seen anything that rich, and it makes me wonder if my wideband is having issues or something. I did do an engine brake just to see what value it spit out, and it was 22.39 or whatever the highest is for the LC1. So that made me think that it must be working ok, but like I said, these values seem very extreme.

 

https://www.rx7club.com/power-fc-forum-47/my-power-fc-lc-1-xd-16-datalogit-wiring-diagram-707298/ see that thread. check your wiring. make sure that the blue wire is grounded separately from the white and green wires for example and you have the appropriate common ground wires.

also, after you check your wiring perform a HEATER calibration for your LC-1. after the car has been sitting for at least 10 hours, with the car off disconnect the o2 sensor from the controller. Then turn the key to the on position. the LC-1 should display an error code (either on the xd-16 display or on your LED you wired in). After 10 seconds turn it off. Then reconnect the O2 sensor. Now put the key in the on position and do a free air calibration using either the button on the xd-16 (press 3 times, then press again) or the switched black wire.