OK- - - -the smaller diameter venturi is the one that begins to flow fuel just above idle speed. All it takes is a couple of hundred RPM above the idle speed the engine is supposed to run to start fuel flowing through that one, so find the vacuum leak, fix it, and get the engine slowed down enough to make the idle system actually work like it's designed.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!