Need help with edelbrock 1406 carb

The Edel carbs are NOT sensitive to fuel pressure. The fuel system is a DIRECT copy of the original Carter AFB design, which was designed to use up to 10 psi of fuel pressure. Carter even produced a chart for tuners to set float level/fuel pressure because one affects the other.

The reason Edel says 5.5 psi is because the fuel level varies with fuel pressure & the carb is calibrated @ 5.5 psi. With 50 + yrs of working on these carbs, I have found they are relatively insensitive to fuel pressure or float level changes, except perhaps for extremes.

Current problem is most likely caused by:
- leaking float
- worn needle & seats
- bad filter [ letting dirt pass ]