94 Accord LX acceleration/stumble/hesitation

I have a recently purchased Accord LX 1994, 4cyl 132, automatic, 4 door, 150 k miles. I guess I have a project as I don't know the history of the car.
It occasionally starts poorly, the main problem is that upon acceleration it stutters, pops once in a while, then takes off. Once the rpms are above 3000 it runs very strong. At cruising speeds I can feel it miss and it seems like it's loading up. If I stomp on the accelerator at 40 it's almost the same as from a dead stop. If I downshift to get the rpms up it will take off fine. It idles perfectly
I recently replace the fuel filter, plugs, cap, rotor. The plug wires look brand new but they are aftermarket. Fuel filter pressure reads 30psi.

Any help is appreciated, :mrgreen:
Thanks,

Roy