There is a special level in Hell for the guy/gal who designed the electrical connectors for the 300 series cars. For the umpteenth time, I've fixed a major or minor problem by cleaning the verdigris crud out of male and female connector fittings. This time it was a rough idle. Take apart the two connectors to the IAC unit, clean out the green crap, shove in some dielectric grease and problem solved. And it is a design flaw because my 95 Civic driving in the same weather and sitting in the same garage has none of this stuff. What a pain.