Originally Posted by renaissanceman

Getting the injectors pop tested is critical for good running. As is correcting any (even slight) fuel leaks -- they introduce AIR on the suction side of the lift pump.

The rack damper can be adjusted:
http://www.peachparts.com/shopforum/diesel-discussion/309971-1985-300d-rack-damper-adjustment.html

Originally Posted by Larry Delor

I see you put new braided hoses on the injectors, but what did you do with the last one? #5? I couldn't tell in the video.
She seems to shake a little at idle too, but that may straighten out when you get the valve straight.
The rack dampener adjustment as mentioned above, can help, but personally I might wait to do that - check first to see if you have an old one, or new one. I think the new ones are brass colored.

Originally Posted by dkr

The old injectors may not have been serviced, but how could you possibly know anything unless you STARTED with pressure testing them?

There is a range for pressure on the injectors and after that they need to be balanced within 50 psi of each other. If they are within spec, but not balanced you could have some funny stuff with your engine like you are mentioning. Also, you have no way of knowing the injectors are actually producing the mist they need and not just drizzling out diesel fluid.

At this point, you NEED the proper equipment or to get the injectors to someone who has the proper equipment to test and balance them.

Most of the original mushroom pumps leak. It's a cheap part and about 15 minutes of labor, so I would replace it.

Dkr.