Stumbled across this thread in my search for the solution to my problem...
'00 NB Manual, so 10mm pump. Pump died, talked to DFIS, quoted $9-1300 to reman my pump. Local salvage yard said they had a "good used pump" for $85, so I picked it up. Problem is that their policy (ins related) is they have to pull parts, so they pulled the pump. In doing so, they pulled the gear AND the hub...
Talked to DFIS about my thoughts of carefully lining up the keyway "marks" inside the hub with the woodruff key slot in the shaft, and if that would put the pump close enough to then fine tune with VCDS, which they thought would actually work. So, thats what I did.
At this point, I learned that I actually got an 11mm pump from an Auto.
Amazingly enough, it starts and runs (VCDS on order...I know, I know...) but is rough at idle, which goes away as soon as throttle pedal is touched, which led me to this thread, where I'm learning about the voltage map (I assume we're dealing in micro volts...) issue.
Where is the best place to go for said "tune" as I also deleted the EGR while everything was apart cleaning intake, etc (267k miles)
Thanks everyone!