This pertains to a 1970 New Yorker, not an Imperial, but since they're both "fuselage era" cars and the problem is supposedly a common one in Imperials, I hope you will bear with me. When it rains, a small puddle develops on the floorboard of my '70 NYer. It is located on the driver's side, approximately where your left foot would be, or right next to the kick panel. You can't actually see any water, but if you touch the carpet it's soaked and the car is beginning to get that musty smell. I guessed that the leak was from the windshield and taped up the edges of the windshield about 2 weeks ago before I went on a trip. Well, that didn't help. So I'm going to fill in with some silicone sealer, but I'm still just guessing at this point. It appears to be coming from behind the plastic kick panel. I am guessing the leak is directly above that point. Is there a systematic way of tracking these things down? Thanks, Mark