the car acts as if it was starving for fuel at 55mph . recently changed the following:plug wires,coil,fuel pump,fuel filters,rotar,pcv valve

i would like some thoughts,as well some ways to trouble shoot. i have manuals but they all  seem vague on this topic.

 

thanks, zeb

Is there a fuel filter by the fuel tank, near the fuel pump?

yes, i replaced that fuel filter as well as another in engine compartment. fuel pump,plugs,wires,coil,all are new. i wsnt hitting 3 gear.i am now ihad a vacumn line wrong on trans. i will take it on hwy to open it up today! yup all 69 horse power. LMAO. i will post my results