Thank you all for the responses. I'm sorry it's taken me so long to respond.

I've been working on the car some. I don't know the idle speed as there's no tach in the car and I don't have a remote one that will work on a diesel. I raised the idle some and it did help with the vibration however the vibration persists just above the maximum reasonable idle speed.

I also played with the priming pump some. It looks like the seals are shot so I think it may be at least part of the issue.

So...

Doing research here I found Bosch part numbers for the items I need to rebuild the pump. Does anyone know a Bosch distributor near SE PA/MD? I called the dealer, they could not do anything with Bosch numbers and some of the parts on their list were discontinued.

Thanks in advance,

Alex