i bought the analog gauge. which is apparently different than the digital in outputs. so the serial cable wont work. i soldered in to pin 75 for an evo 8. grounded the other end. so it works on my evoscan.

this is my gauge. http://www.aemelectronics.com/?q=pro...uego-afr-gauge


the question is- when my gauge goes to 13 afr. the evoscan reads 14.1 or so. so i think i need a different equation. i have tried the 2 i found on here. which is-

display: AEM UEGO
LogReference: AFR
RequestID: 3C
Eval: 0.03913*x+9 AND 0.03913*x+10
Unit: AFR
MetricEval: 0.03913*x+9 AND 0.03913*x+10
MetricUnit: AFR
ResponseBytes: 1
GaugeMin: 8.5
GaugeMax: 18
ChartMin:8.5
ChartMax:18
ScalingFactor: 10