Transmission will not downshift for power

The only code I get is P0443 about the Purge Control Valve- checked again yesterday. I heard it might go away by resetting the computer and so disconnected the battery for 1+ hour but the symptom remains. I replaced the Purge Control Valve several weeks ago- probably need to look at the electrical connection since it is still coding.

Hi Ken, thanks for responding.

Yes there is vacuum. The wires look ok, the retaining clip snapped off the head but it seats well and does not slip out unless pulled.

There is a click, the solenoid operates connected to a 9v battery. Its old but the vacuum lines look ok.

The code remained clear for more than a day, but came back while attempting a minor acceleration at 60+ when the gear selection stuttered. In this situation I can press the pedal to the floor and the car will kick down and accelerate rapidly. The same3 thing happened near 30-35 mph on an onramp, looking to sort position, a little more pressure on the pedal resulted in stuttering acceleration until pressure was let up. Service engine light flashes in these instances- about 30 seconds then remains lit steady.

Holy Moley I found it! My son talked me into replacing the Throttle Position Sensor which had no effect, so I took it to a shop. Hooked up to diagnostic equipment, with the brake depressed and throttle applied (loaded) the #3 cylinder was misfiring consistently, right off the screen. But no code would come. Replaced the #3 coil and all is good! No clue why it wouldn't code properly. Appreciate your effort and time, thanks and take care!