everytime it rains hard or more than an hour or so My 1990 prelude si's sunroof likes to collect water and leak all over the driver and passenger side. It is only when I drive that the water moves around and pours out. Its not a constant leak, as soon as the water pours out and i start driving no more water collects up top. as soon as i stop for more than 20 min water collects again. Somone said it may be a drain that is clogged and not allowing the water to drain, but i have no idea.

 

i would say that the drains are stopped up. You can unstop them by pulling the roof interior panel down. On all 4 corners you should see clear hoses that channel into the chassis of the car. Unplug them from the sunroof and put an air compressor up to it. This will blow all that crap out and then you should be good to go.