Hi, I'm new here, so I'm hoping this question comes up often enough that someone will know the answer. I recently got a ScangaugeII for my Focus ('07 ZX4 MTX) hoping to better track my fuel economy. Here's my problem. From what I've read my car should have deceleration fuel cutoff, but the Scangauge does not register it. I've set the "cutoff" value to 4 above idle TPS (22 and 18 respectively). I've tried tapping the brakes when decelerating. I've tried deceleration with higher rpms. I've tried disconnecting/reconnecting the Scangauge. Oddly it does not read an open loop on deceleration (although it will read "open lp" at startup). Instantaneous fuel economy generally reads around 100 mpg when coating in gear (maybe 20% higher when coasting in neutral). Any thoughts on how I can remedy this? Is DFCO even active? When does it kick in on your car?