tos wot

For years, whenever I re-adjust the tps to a .42 volt idle, it always automatically showed 4.6 at WOT. I just took it out for a few logged runs at WOT and I could feel it wasn't doing it's normal thing so I checked the tps. Idle was right on at 4.2 but WOT was only 4.25. Can the tps be adjusted...