ha, this happened to my 91 honda accord about 8 years ago. I actually took it to our mechanic (i know it has nothing to do with the engine but he does that type of work as well). They put someone in the trunk and closed it and took a garden hose and made fake rain haha. The guy in the trunk with a flashlight figured out where the leak was and they sealed it. I think if I can remember that the leak was around the rear windshield and theweather striping on the trunk itself.