Im currently running Autolite 3923 copper core plugs and NGK wires. i have had to replace the plugs about 3 times in one month. And now they are starting to bad agian. At least i think its the plugs. The car sounds like its sputtering and missing alot and every time i'v changed the plugs those problems went away. Then after a while the problems come back. I know my CPS wiring is bad, my car is idling around 1K some times. Any ideas what would cause the plugs to keep going bad?