I've been trying to correct a rough idle and this is what I've done. Cleaned the throttle body, looked inside for any sign of oil (looked OK), changed plugs, NAPA cap & rotor button, Taylor hi-temp wires and I've ran out of things to try. It sits a lot and is hardly ever driven. I keep it hooked up to one of those battery tender's to keep the battery up as I know D's don't like low batteries! Could I have some kind of condensation in the lines causing this? I also put a bottle of Techron in it a while back. If anyone has any ideas, let me know? Thanks.