a couple months ago i gutted my EBPV. pulled the pin, butterfly out of the housing, and the piston out of the pedestal and plugged the holes. i even unplugged the plug on the pedestal.
I started the truck before leaving the shop tonight, and noticed about 2 minutes after, the idle jumped up to 1000 and stayed there.
If i touch any pedal, the idle will bump back down to the normal 650 or so. It doesn't do it all the time, but i've found that it does it more when it's cold.