I would say easymap could help you with this, but indirectly. I would log the injection pulse and lambda, and see if its getting to 100% duty cycle, before full throttle / max speed. If it is then maybe fuel pressure is not enough to keep up with demand. I once used this to detect a fuel supply problem on a mates car, It would die for no reason. Eventually we logged it dying, and you could see it getting leaner and leaner (from the lambda value) but you could also see the fuel pulse getting longer and longer as the ECU tried to solve the lean problem. This indicated a fuel supply problem, all be it intermittent and at idle. Thankfully it was a simple inertia switch that fixed that one, but the ECU logging pointed us to the fuel system. Good luck.