high fuel pressure is exactly what the pro mechanics suspected as well. I have a Carter electric pump and a Holley fuel pressure regulator. Weber specs say 2.1-2.5 psi. Mine was at 2.5 and I backed it down to 2.2. I unbolted and looked for drips coming out of the carbs with the pump running and the needle valves appeared to be doing their job.
I will post again when the thermal insulation gaskets go in.
Thanks for your input...
But did you put an actual gauge on it? Or are you relying on the maybe right, maybe wrong numbers on the regulator? In other words, do you know the ACTUAL pressure?