Why does the TP sensor 1 voltage jump from 0.9X V to 0.3X V & do nothing else ?
Also the clip with the scope image,the red trace CHB doesn't look to be being grounded to me & is too far zoomed in to be able to see really in that clip whats going on.
TBH i find posting youtube clips a poor way of trying to see/hear what is going on, i would rather see the PSD file or at least a screenshot of a trouble area.
You keep saying the PCM is commanding the TB shut, how do you know this ? i see no current captures or any for that matter of what you claim to have scoped apart from this youtube clip.
Have you not considered that either teeth have jumped/stripped in the TB & the PCM is actually trying to drive it the correct way ?
I did ask how far the TB plate is opening KOEO @ WOT but got no sense back on another forum