There is a leak which results in deep water on the drivers side floor board after it rains. No visible problems with window stripping or obvious things. Appears to be coming through the dashboard maybe?

A water leak under the dash could be the heater leaking near the glove box, or a windshield leak, or sometimes the drain tube for that area has gotten plugged up and needs to be cleared out. Most times a little blast of air pressure will do it.
Hope this helps.

Looks like you may need new weatherstrip for the driver's door including the pieces for the window.

Water leaks are the hardest to find and fix. I usually strip the interior and then I can see where the water is coming in from....Check sun roof drains, door bottom drains, rear window areas for water.

Try changing the spark plug wires. With age they tend to build up too much resistance & the spark at the plugs become weak. If the spark plugs haven't been changed, have this done because with every 1000 miles the gap widens 1/ thousandth of an inch altering engine timing & preformance. Old spark plugs make for bad starting. As far as the leak, do you have any rusting around the front window frame. If yes, have it repaired by removing the window & accessing the damage. Often the window seal is worn with age & the like. You could have someone with a garden hose pour water on the car til the leak is recognised by looking under the dash. It may also be coming from a rusted floor board. Check under the Jimmy to see if there are any holes obvious. Hope this helps. Good luck!

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How To Fix Your Leaking Saab Convertible Permanently No New Top

its caused by your aircon the hose may leaking under your dash board

Does it just leak when you are driving or does it leak when parked as well? The reason I ask is if it leaks when parked, you can eliminate a floor pan leak, or a leak that gets water from the wheel slinging it up in the wheel well. These things can be a pain in the *** to find. If it is not obvious, like torn, worn or out of place weather stripping, then I usually take a pressurized hose to wet only one section at a time and narrow down the source of the leak. It could be the seal around your windshield, stripping around the door, or even water getting inside your door and somehow finding its way to floor by draining along the inside door panel. Good Luck! I hope you find this to be very helpful!

If you have a wet seat then it is likely defective weather stripping around the window.

Try this. If the floor is dry, then it rains and the floor remains dry, only gets wet after a drive in the rain or on wet streets, you may have a hole somewhere.

Check for holes from missing rubber grommets or holes in the floorboard or firewall from rust. Check for any rust holes or missing rubber grommets under the car or on the firewall, anywhere water can splash up into the vehicle from driving in rain or running through puddles..

Check wet spots along the carpeting all the way up under the dash, if the wet spot is higher than the floor itself, you could be getting the water from splashing through puddles.

Any holes under the car or in the fenderwell even up on the firewall can cause this problem.

First check for any obvious signs of rust, if none are found then look for missing or defective rubber grommets.

I am the original owner of camry xle 1998 with wet floors. In 2000 I had drivers side door seal leaking at welt. Removed old door seal and new weather strip on drivers side installed. The door panel was never wet, but wet at bottom of door where there are drain holes...slowly leaking under carpet.
In 2001 later water again. Coming from overflowing A/C evaporator-drain plugged/ tank full of debris. Removed evaporator, cleaned + drain cleaned.
In 2003, driver door seal against window rotted. Removed door panel and found leak at window belt molding at the mirror joint inside + out. Lots of mold under carpet needed to replace! Made a fuss at dealers for reacurring problem and they replaced the carpet for free.

check the sunroof drains,they may be clogged they are located on the right and left front of the sunroof.