[GM Line Rat]

If this is a problem......You may want to replace your distributor cap with a new one! Moisture should not be getting inside the cap. Otherwise, Get an old piece of Carpet etc..., Large enough to cover the underside of your Metro, Then put it down on the floor of the Garage where you park your car. This will keep the moisture from the concrete from seeping up and into your engine bay area while the car is parked. This is also a good practice when storing the car in the garage for long periods of time......And exactly the reason I layed down 2 layers of thick industrial grade plastic on the gravel base for the new garage I just built, then poured the concrete floor over the plastic. It prevents moisture from seeping up thru the concreate and rusting the underside of my "Garage Queen" Cars. (My Toys).