Quote:

Quote:

Quote:

put your finger on the end of a straw that has water in it. what happens



That's not how they work.



wel draw us a pic and show us how it works



I included a picture of how they work in my post.
http://www.carcraft.com/howto/ccrp_0507_carb_tuning_tips_tricks/photo_12.html

The main does require the bleed to work, idle does not. It's to mix air with fuel and to keep the fuel from siphoning (both) and to provide additional atmospheric pressure to get the main to flow.