Hello, I repair the zenith carbs of my 220s with a refubrished kit and adjust them according jaimekop manual. This is the problem I have:

When start the engine at cold (accelerated idle) run perfect at idle and when push tthrotle, but when it warm up (choke flaps full open) at idle stop, only run well when push throttle.

What do you think is the problem? maybe a air leak between carbs and manifold when dissasembled them? I tried to measure the vacuum with a gauge but is impossible because vacuum need to measure at idle, and at idle my car stop