I understand that but I am just trying to fix that one area so I can stop the flow of water into the car.

What year is the car? Most likely route is water getting behind fender skirt.

It is a 89 Oldsmobile Delta 88. The only time water is in the passenger-side floorboard is when the car sits still. It I am moving it don't get wet.

Is the antenna on that side? Could be dripping down in where the door meets the fender too. When car get to that age the seals to everything have well shrunk and begin cracking.

If you look at the pics I posted you can see that if is from the passenger-side body pillar. I took all the trim off and pulled back the carpet and traced my water problem to the holes in the body pillar on that one side.

Sometimes I think car engineers make secret little "time bombs" thought up to make sure you can't keep a car too long.

Well this car has a lot longer to live. I have a small investment in it so I am wanting to get some on the body work done on it and then try to find matching carpet in a junk yard or pay the $175 for brand new carper. I haven't really decided yet. I am trying one thing at a time for right now. After I fix this and I have no more leaks I will tend to the carper. Then after that I will work on undercoating the inside of my trunk after that. I have a crack in a body seal and it is very expensive to fix so I am gonna undercoat the entire trunk including the rear quarter panels and then it can leak all it wants and it won't rust any more on me and is a cheaper fix.

I loved that body style. I had a 87 Regency and a 89 LeSabre. Both had their share of rust issues.

But also with older cars like mine they are a lot better built. More metal compared to the newer cars theses days that are made with sheet metal and fiberglass.

for the rust work you have to do if oyu cut the rust out and get some por15 and spray everything down and into the hole with that its supposed to neutralize the spread. for alot longer than a year

the body seal isnt something you can silicon up?