Thanks to Brian and Dave M. for your suggestions. After finally getting time to look at my Repair CD, I realized the hose I was referring to came off the Boost Pressure Control Valve on one side and had broken loose from the nipple on the bottom of the Control Housing on the other. After reattaching the hose, the hard acceleration surge problem that I asked about in an earlier post is now resolved. Another checkmark on the shrinking punch list.

Dave Jonas
'84 300TD 240k mi
'86 300SDL 138k mi.