Odd Problem

I am having an odd issue with my Duster. All of the sudden, it will not idle in drive well, and not at all when in drive with the lights on. It will idle ok in neutral and will respond to idle adjustments on the carb. The car cruises ok, but comes up in engine rpm slowely and falls on its face when the trans shifts. At speed, it accelerates well at higher rpms.

Starting is not as easy as it should be as well.

I have swapped on another Eddie carb I had, along with another distributor, ballast, voltage regulator, coil, ignition box, plus checked the obvious vacuum lines and ground to the ecu. All of this did nothing.

Plug wires are ok. The voltage is 14 volts at idle, 13.5 in drive, 13 with lights on in drive. This has been normal for a while. Oil pressure is fine, no abnormal noises.

What I have noticed is that fuel pressure is 8.2 psi, which is about 1 psi above where it usually is. The fuel filter is completely full of fuel. Could the pump be faulty, pumping too much fuel into the carb? What else?

Maybe bulkhead or charging system insufficiency?