bs 38 carb. pressure test. left side no pressure?

[pdavis]

working on bs38 carbs. put on new rubber diaphragms. lift up slides and put thumb over vacuum ports. right side holds slide up. left side comes down fast. tried switching caps and slides between each other don't know where leak would be. I think it is internal. need help!

 

[gggGary]

Little known fact: A leaky seal on the end of the choke plunger will let the slide drop fast also. Yeah that was hard earned knowledge.

 

[XSLeo]

An enrichener or choke plunger that won't seal lets the sleds drop fast.
Leo