1990 Ford Festiva Slow Acceleration

Recently (less than 1 month) car began accelerating at what I would say is half the rate it normally used to. I took it to a mechanic and he gave it a tune up and checked the computer for any error codes. None of the components or parameters the computer tracks were malfunctioning or in error. As part of the tune up they replaced the distributor, wires, and plugs. Car seems to start and idle fine. Performs better after 5-10 minutes of driving but not back to normal. Car accelerates normally through the bottom part of the RPM band then seems to bog down and accelerate rather slowly. She used to do 90mph and now I can barely hold 65mph. Shop checked catalytic converter and it showed normal. Shop checked compression and #1 cylinder was at 125 psi and the other 3 cylinders were at 150psi. I am not sure which way to go fuel or airflow. Any help would be appreciated