Try resetting the PCU (remove negative cable for 30 seconds) and see if the performance returns. Not sure of the outcome, but I would suspect that resetting the PCU will possibly negate some of the many ways that the firmware has "learned" to curb performance.
I had installed a boost controller for a few days. I took it back off, and never got above 9 pounds boost at WOT. After resetting the PCU, the boost level was resurrected.
It could have been my imagination.....
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