Bill and this board helped me with a 4.3L TBI swap into my '82 Jeep Scrambler several years ago. The Jeep was emissions tested on a dyno and passed every other year for several years without much trouble. Colorado changed their rules so that now my vehicle is sniffer tested instead of dyno and it failed miserably on hydrocarbons (220 ppm limit, 341 ppm tested) and CO% (1.20 limit, 2.39 tested) at idle. One of the testers mentioned that she could have failed it on a visual only. It seems to load-up on fuel at idle then belch a little black smoke and stumble when rev'ed. The Jeep passed everything with plenty of margin at 2500 RPM. I've forgotten just about everything I learned regarding tuning and programming but I really need to get this thing tested and registered within the next few weeks and am hoping to get a jump start from some experts. I used TunerProRT for data logging and editing and can provide a data log and/or whatever else that might be helpful to diagnose. Any suggestions on how to proceed? I appreciate any and all help.