well what I know:

1. if I start and drive it before the ebpv kicks in cold weather it runs fine has normal power.
2. if I allow it to go into warmup then get in it and drive it the idle comes down when the shifter is moved but there is no power until either it warms up to some temp or I shut if off and restart it.
3. I have not tried to go to full throttle to see if the ebpv opens but have tried about 1/2 or 3/4 throttle, I will try full throttle the next time.

its not a slugish thing, it just seems to me that nothing is broke, just how the software in the eec is written. mine doent cycle either, its either closed and no power or it opens and full power is restored. I wonder if all diesels do this or just fords?