Hi, what is the history of this problem? What parts have been replaced, if any, in an effort to repair the problem?

Hi, sorry for the delay I was away earlier. The air pump will not cause poor running or lack of power. Does the car seem to misfire? Does it idle smoothly and just have no power on acceleration?

Ok, as you can imagine it's difficult for me to pinpoint the problem without actually testing the car but I would suggest that you consider replacing the distributor caps, ignition rotors and ignition wires. These parts cause all sorts of running problems on this model. You should also have the exhaust system checked to be sure it is not clogged and also replace the fuel filter if it has not been replaced in the last 30,000 miles.

You might even have one bad ignition coil that breaks down under load.

Let me know if you have any questions.

It's possible, I had mentioned that a check for plugged exhaust should be performed. If the exhaust is plugged the car will never have power. If the car has good power on occasion I would not think that the exhaust is plugged.