ISL Torque reduced mode

[corny98]

I'm having issues diagnosing my deleted ISL Cummins, it has low power with Insite showing no codes and injectors passing the test. Only thing I see is when I view live data the truck says torque limited mode when over ~40% throttle.
50% throttle and 100% feel the same, truck has issues getting to 60mph empty.
The delete tune has been on the truck for the majority of its life so I don't believe the problem if from that.
I adjusted overhead as the engine is at 10,000 hours and everything was still within spec from new.