A/F Gauge goes crazy w/ Datalogger

[DiamondStarM]

I just got my long awaited datalogger and hooked it up last night and rode around to see some general readings. I've had the car for a few months now and the first thing I did was get a boost and a/f gauge. Now I know the a/f guage is worthless for anything but getting a general idea but when I hook the OBD2 connector up the a/f gauge goes crazy, sometimes it lights up all the lights, sometimes none, and sometimes its right. Its always acted 'normally' according to RREs install page and if I take the OBD2 connector off its fine again. Anybody else have this problem, is there a fix, or maybe I did something wrong?

 

[Staytuned]

Check to see if you have a good solid tap into the o2 pin on your ECU and make sure you have a good solid ground too.