Originally Posted by Geoff_lundy
I have had that same problem, I even went to a 2 barrel and the performance was worse. I am convinced that the fuel sending unit and/or fuel pump that come stock in these just aren't very good at regulating the fuel.
The fuel pump might be bad but hold off just yet.
What year car and engine?
Was the engine rebuilt?
Have you replaced the gas tank or sent it in for a good cleaning out?
Have you replaced the fuel filter?
Do you have rubber fuel lines?
If rubber fuel lines when was the last time they where replaced?
Does this happen in warm weather or cold or both?
New carbs normally bring out other problems in the fuel delivery systems such as weak fuel pumps, collapsing rubber fuel lines, bad filters etc.