I changed the plug wires, plugs, cleaned the MAF, I the car still will not idle smoothly.
My next steps were to check the coil pack and check the pcv valve. I did notice that the last time that I put gas in the car, there was no hissing sound when I took the gas cap off (and I have a CEL light, which I suspect is a bad gas cap). Could a bad gas cap effect the idle? Other than that, the car runs great.