Indeed...I am using the term detergent in the most basic sense. I am sure it was some sort of solvent. My bad. I didn't mean to start a debate on chemotaxonomy .

Sorry not to mention the vehicle. I guess I got ahead of myself.
It is a 1983 300td.

Thanks for the run-down dieselbenz1. None of the info talks about the 1-2 shift, though. It is most definitely a flare. So is this probably a vacuum issue?
When I check vacuum from the VCV, should it go to zero when I give it throttle?