Squeaky clean #2 plug

[La Voce]

Oh experienced ones I seek your wisdom. I suspect the #2 cylinder in my 2.0 Weber converted 1979 Alfetta GT is not participating. I brought the car back to life a few months ago after 5 years of sitting on a flatbed trailer. The webers idle OK but not perfect, a tad bit rough below 1,000 rpm and a slight stumble up from idle but all in all not too bad, and under full throttle the engine revs up smoothly and pulls decently, although I have no other frame of reference for a tired old 2 liter other than my Milano Verde, so that's no comparison. But acceleration does seem a bit anemic, esp. under a load such as going up a hill. Although- she sounds magnificent I have been cleaning and tweaking the carbs since I got her running, and she was running very rich when parked, and initially when I got her running. All four plugs were equally sooty as was the tailpipe. I installed new Bosch plugs, tweaked and fiddled, and finally have #1, #3, and #4 plugs a perfect light choclate brown color, but the #2 plug appears as it just came out of the package from the parts store, even after over a hundred miles of driving. I confirmed good spark by grounding the plug with the engine running. Interestingly, adjusting the mixture screw for the throat that feeds cylinder #2 has no effect on idle speed, either full out rich or full down closed. There is no fuel or even the smell of fuel on the #2 plug when I pull it after extended idling. It's just hot and like-new clean, as if it has never ignited a fuel/air mixture. I have confirmed the carb throat that feeds the #2 cylinder is pulling an equal amount of air as the other three using a float syncrometer at 2,000 rpm. I removed and cleaned all jets, completely removed the tops from the webers, verified correct float operation and weight, and using compressed air blew out all carb passages accessible without removing the carbs. I have performed two applications of carb cleaner on all parts, including a full can of cleaner run through the fuel tank. In spite of all of this, I suspect no fuel is reaching the combustion chamber in cylinder #2. Is it time to pull the carb?