Thanks for responding, I just bought the car and this is all new to me, but it doesn't miss all the time. I can drive it for 50 miles and it runs perfect and then all of a sudden it starts missing. The miss isn't real bad but just bad enough that it takes the fun out of driving it. Sometimes it will miss as soon as I start it up.
The records that came with the car shows that the plugs were changed about 30,000 miles ago, I checked them and they looked good. The rotor did have some corrosion and pits, I cleaned it and it ran smooth when I started it up and ran it for about 30 miles, then it started missing again. I believe it has the K-jetronic.