So got in my convertable and notices the whole back passenger floorboard had about a damn half a foot of waterin it. It had so much that it spill d over into the front passenger floorboard. The drivers side is dry as can be. I also heard what sounded like sploshin noises comin from the back passenger side somewhere...soundd like maybe under the seat or something....any help?

If I recall correctly, the drain for the vert is in the panel in the back with the rear triangle windows. Sounds like yours are plugged.

on the top seal of your windshield, on each corner there are two small drain holes for the front.
if you could get some compressed air in there you might be able to remove what ever is clogging it up.

where can i acxess these to see if its plugged?

.... take off the interior panels?