I am pretty sure I am now not exposing any of the 3 enriching holes.
Still, I am having a hard time eliminating the vacuum.. I have to have the idle speed screw barely touching (less than 1/2 turn) for the vacuum to significantly drop.
I will play with it more this week and see if I can come up with anything else.. If i can figure out how to post pictures.. i'll add those as well.
Just for the record.. I currently have idle jets at 55/47.5 and main jets 175/174
Good to hear back from you.
These Weber 32/36 DGEV on 6 cyl engines NEED a .75mm primary idle jet. If not, (55/47.5) you will won't have enough fuel for your engine to run on at idle, therefore having some vacuum reading at idle.
This also sounds like the nut on the throttle shaft holding the throttle lever on is too tight, (more than finger tight and one or two flat spots tighter).
If this is the case... the throttle shaft will be in a slight bind, therefore not allowing the throttle plate to come to a complete close. So, when you back out the idle speed screw, then turn it in you will only "increase" opening the plate slightly because it is already open some. This is why the ZERO vacuum at idle is the better way to diagnose these types of problems. This is where it gets tricky and why some people just give up and say F...It.
Take a Deep Breath and take another look at this. I also recall you have a 34-DGEC Solex, there could be some differences in jet sizes here.
Where did you get your SOLEX? Is it new, or was it already on your vehicle?
Let me know.