New sparkplugs and wires and has a miss at 2000 to 3000 rpm

If you can easily access the plug wires at the plugs you can disconnect the wires one at a time while idling and when you get to the cylinder where removing the wire does not change engine idle then you have found the culprit. You should use insulated plug wire tool for removal. The spark plug porcelain may have cracked during install. If you had no miss before the plugs and wires replacement then you should always suspect your labor as the problem or maybe even a bad part. Any CEL on?