It would be interesting to get some others tuners test results too from their setups.
I was done simply "mechanical" limiter to my car "throttle" potentiometer. This was making really easy to achieve steady IQ for my test "track" (normal road)
Then i was just accelerating that selected RPM scale with IQ20 and logging results for further analysis.
As i mentioned earlier only clear difference was happen when i was putting AC on for getting some extra load to engine. This was indicating really big difference, so my opinion is that for year model 2001, factory has done pretty good work. Before test i was quite sure that there has to be something what make some benefit, because EGR is blocked mechanically and it is usually active on those situations.
Of course i have open mind for all kind of test for getting better MPG