ramcharger, it's a 4psd.
Duh!! My mistake, lol!
You can only open the secondary blades so much for there idle circuit isn't adjustable, not adjustable 4 corner, so once you get the sec blades beyond a certain point.....
Granted, you can only go so far, no doubt.
Maybe there was junk in it, but I haven't had to pull a new carb apart brfore running it since my buddy pos demon.
No matter, an 830 chokeless annular took it's place and idled great out of the box.
ramcharger I pulled the 750 dbl pumper off of my 340 and tossed on to the 440 and it idled perfect and only lost a hair of top end over the 830cfm, in other words ran great, so what was the difference you think?