I have a 1998 Toyota Sienna XLE which has 122000 miles on it. I had got it from an auction. The van runs great but there is water coming in from don't know were in front of the front passengers seat. I live in Chicago so during the cold season I have block of ice on the floor. What should I do to fix this problem. Please let me know. Thanks.

I have a 2000 Pontiac Grand Prix that recently the floor on the front passenger side is wet. The first time there was about 1 inch of standing water in it - and it was after a really bad rainstorm. The car was parked at an angle - front end high. About a month later the floor was really wet but did not have standing water and there had not been any rain in days. It is definitely fresh water - no antifreeze or windsheild fluid or anything like that, so we're not sure where it's coming from. When we first bought the car - we had a problem with the evaporator case drain plug clogging up and the floor on the front passenger side was wet and it was under warranty the dealer fixed it, and we have not had a problem since then. If someone can tell us where the evaporator case drain plug is we could check that to be sure it's not clogged up again. If anyone has any ideas/suggestions - we're thinking it might be a hole in the firewall or something...maybe someone knows of a service bulletin on this one...we'd rather not spend alot of money if we don't have to. Thank You.