<VV> Need help diagnosing 140 carb problem

[Bill Hubbell]

Geoff's 1965 140-PG Evening Orchid Convertible is back on the road again 
after a 1 year stint in my garage getting body work and a fresh paint job. 
We have a problem with one or more carburetors loading up after the car 
warms up and I need some help diagnosing what is causing it. (I am fighting 
a cold and my brain is too fuzzed up to think straight)

Here are the symptoms: Car starts up fine when cold and runs great until 
warmed up, then starts sputtering at idle and will die if left in gear at 
idle.  Starts up again very rough, but as soon as the engine speeds up it 
smooths out again, only to roughen up again when it returns to idle.

My initial thought was that we had a stuck float needle, but I have looked 
down the throat of all carbs (after warm-up) and they all look dry - I don't 
see moisture in any of the 4 carbs.

What next?

Bill Hubbell