My 89 Prelude has taken to drinking a lot of rain water everytime it rains hard. It only fills up on the passenger side behind the front passenger seat. I changed the door seal (gasket) and checked that the sunroof drain holes are clear but no help. What's really weird is that there is no dampness on the inside walls, doors or headliner. How the heck does the water get down there? Has anyone dealt with this problem? Maybe I can raise Japanese Koi back there and make some money! Thanks for any suggestions.

Thanks for the ideas. I don't think it's holes in the floor because it gets soaked even when it's just sitting in the driveway. But I'm sure my wife will be happy to blast me with the hose while I'm sitting in there. Odd thing is it doesn't get damp on the roof, sides or doors - just the floor starts filling up. Very frustrating. Thanks. Chas