I've got a leak in my car, front passenger side... I know its not the heater, that was taken out long ago. And it only leaks when it rains, any spots our car's are known for leaking at?

 

How does all the weatherstripping look, do you have t tops?

 

does it still leak in the rain if it's sitting in the driveway? hose the hell out of it everywhere and have someone else sit in it and watch for water

 

I have an 86 Trans Am w/ T-Tops, which leak do you want me to explain?

 

For once Im the first person to reply that has the ANSWER!

I have the exact same problem. A pool develops on the floorboard under the dash on the passenger side that only shows up when it rains (or car wash)

Check in your engine bay...underneath the fan motor...tucked down behind the wheel well....you will find a load of debris collected over the years....this has rotted a hole in your firewall.

I pulled back the carpet in the passenger side footwell and I found the hole. Ive yet to figure out how to fix this problem. I may just JB weld a spot of sheet metal and udercoat it all.

If this isn't your problem I don't know what is.

 

sounds just like what happens on my drivers side (91 RS coupe). I'll have to look into that debris idea...

 

That was it, thanks bill

 

This is exactly where mine went,it also did the same on the drivers side(and many other places for that matter).Imagine my surprise when I took the blower motor casing away and my hand went straight through the firewall!!!Nothing a mig welder won't fix