I encountered some strange shifting behavior (WOT
2-4, way lower shift RPM than programmed). At
the time I logged this there were no codes or any
indication why.
Two throttle codes popped later in the week, the
P0123 put me onto the TPS voltage which was all
the way up to 4.95V at WOT. I had removed the
stop screw on the new Professional Products TB
to get over-center opening (blade parallel to the
bellows which is bent).
I tweaked it back to 4.70V max and the car is now
shifting as commanded.
I believe that TPS voltage greater than the 4.75V
fault threshold makes the trans shifting go to some
kind of failsafe, shift-early mode. And that this may
be at the root of a lot of these "my shiftpoints are
too early and don't change" problem reports. It
seems like a real-time thing, not needing a code
set to start messing.
If you are not seeing WOT shifts moving with your
programming changes, monitor your TPS -voltage-
(not %) and be sure it is consistently below 4.75V
at WOT.