What is the proper way of hooking up the wire for the plx? I use the power and ground from the center console of a eg and connect the white wire to the ecu. While doing part throttle tuning on my car. The a/f on my plx and dyno a/f will be similar, but the WOT tune is off by 1.5 a/f.. I dyno at 12.0 a/f and my plx read 13.7. Anyone have similar problem like this?? The a/f on the s300 is off to the 2 also.