Yesterday morning I found about half-an-inch or so of water in the driver side floor from a heavy rain the previous night. The floor area was the only area that contained water. The seats and dash were dry and showed no signs of water leaking onto them... However, at the top corner of the A-pillar where it connects to the roof on the driver side - the headliner is very damp -- which leads me to believe the water is getting in somewhere around there..

I am posting here hoping someone had this issue and can shed some light on how to resolved it immediately.

Thanks
99 CRV with a sunroof unfortunately.

 

The first thing to do is check your sunroof drains. There is a tube running from each corner of your sunroof to down behind the corresponding wheel (i.e. above the driver's head to behind the driver's front wheel). Fill a measuring cup, or something else that's easy to pour accurately, with water. Open your sunroof and look at the front-left corner for a tube leading forward towards the front of the vehicle (down the A-pillar). When you find it, slowly begin to pour water down into the sunroof channel. The water will either drain behind your driver's front wheel onto the ground, or it'll backup and leak down into your car. If the water backs up into your vehicle, your sunroof drain tube is probably clogged. You'll want to use an air compressor to blow air down through the tube until the clog comes out the bottom. If you see this happen, pour more water down the tube to make sure it flows freely.

If you pour water down your sunroof drain and it's already flowing freely, then you've got a leak somewhere else. Pull down the A-pillar trim on the inside of the car and pull away the headliner in that corner as best you can. Hopefully you've got access to a garden hose and spigot because that's the best way to find a leak. Remove the nozzle from the garden hose so it's just open at the end. Tape the hose to your roof so that when you turn it on, it directs a drenching flow down over the driver's side of the windshield, driver's door, and a-pillar, and then make sure your driver's door is shut, windows up, sunroof closed. Turn on the hose and let it flow as you enter the vehicle from the passenger's side and look for drips.

I'd put money on this being your sunroof drain, My brother's Integra had an issue with the passenger's side drain clogging and overflowing into the vehicle very often. The car had previously been totalled (hit on the passenger's side) and I think the body shop that did the repair work partially pinched the drain tube when they put the car back together.

 

I stopped by a local shop today... He didn't have alot of time to check it over but he did check the drain tube on the driver side and he said it flowed out the bottom of the car near the front tire as it should have... I made an appointment for Thursday and hes going to do a better examination.. I will keep this thread posted.. Thanks!