I had carb off this week, checking jets and such. After re-assembly I set baseline tune on the bench. I noticed with idle screw 1.5 turns in once touching was exposing the enrichening progression holes.


This hole being exposed @ idle causes rich idle, and vacuum advancement if using weber's ported vacuum source with your dizzy.


about 3/4's of a turn in is all I needed to keep enrichening holes above/level/blocked with throttle plate.


You can verify this on the truck by looking down throat of 32mm bowl and locating the enrichening hole (its located on passenger/choke side of Carb) and with throttle snapped shut should be covered up by, or above throttle butterfly.


I don't have a vacuum tester but maybe able to verify idle screw is in correct spot with zero vacuum at dizzy port on carb as well.


My Weber is 32/36 DGV made in Spain, plastic floats.


My float levels were also whacked 8mm from gasket to top of float. Paperwork in re-jet kits states 18mm from gasket to top of float.