Re: Adjusting carb (continued)
You set your initial timing with the vacuum advance plugged. It may or may not increase when you hook it back up depending on its vacuum source, emission related controls, and other variables. If you had a manual for that engine it would probably give you a spec @ an rpm to check the advance of the distributor w/o the vac adv.
If it diesels keep turning down the idle a little at a time. If you can't get it to stop and still idle smoothly...you may have secondary thottle bore/ butterfly alignment troubles. Usually the dieselling, or afterrunning, can be remedied by just turning down the idle a little.