Not very active on here but going to jump in on this and offer up an opinion. I am a dealership tech/service manager and have to say I wouldn't be happy with how it's been handled to this point either. With an issue like this technology can be your friend. I read through what has been done to this point. Again just my opinion but here goes. this system is unique compared to past systems as it is an entirely dc system. With that being said, at the rpm the issues are occurring demand for electrical output is the highest. Polaris is using capacitor to essentially smooth out supply voltage to Ecu and other components, start here. All need to be charged, discharged and tested. Bad voltage in, bad out. Should be able to graph data with digital wrench to see if at the rpm the issue is occurring if injector supply voltage is dropping or if any other critical voltages are changing. Low supply voltage=lazy injectors, poor fuel pump performance and the list goes on. Also if this doesn't yield anything I have in the past re-flashed a computer to different injector color code to see if issue is rich or lean condition, just don't currently remember which color was which direction. Yellow was middle of road, but if improvement was made this point directly to fuel delivery issue....replace injectors. I have not tried this on an axys, so can't say for certain it's possible without dw in front of me It's becoming common for injector tips to clog and performance to fade, have had success in ultra-sonic cleaning. My money is on the issue being electrical, it literally would take your dealer 20min to swap out chassis harness/capacitors from known good machine to try and resolve issue. There is more potential causes to this issue, just throwing some ideas out there. Hopefully it helps, the longer I think about this may come up with some more potential causes. its a machine it can be fixed just stay on your dealer. Not sure lemon law would apply in this situation as there hasn't been a "major" failure. Don't quote me on that though a bar stool is a far cry from the bar exam.