I have a Daytona Sensors wideband currently hooked into the firewire of my X4. I did put in the correct data so the X4 could read my particular wideband output. But what my X4 data logs have for AFR and my gauge are worlds apart. Tried different equations to no avail. Called SCT for help and instead of trying this or let us get on TeamViewer and let the SCT TECH try it themself and help. All I got was a two-minute phone call and the guy saying you put in the right info but I don't know what to tell you!!!! So anyone using my setup and it is working properly? Would like to hear what wideband gauges are showing the same AFR on the gauge the handheld and the laptop. Thank's to anyone willing to comment.