When it rains and I make a left turn my wife's feet get soaked. It comes from under the dash and I can't find where it's coming in. It's not the heater core and I don't see any leaks coming from the windshield and I don't see anything where the fan is inside the engine bay. All the seals are good and rubber around the windshield is good and it only does it when I make a left turn when it rains any ideas on what to check would be nice

 

Check the cowl, or could be a fresh air door not sealing. GM came out with a thing called Astro Ventalation in the 50's. Whether or not you have the blower running, you are getting fresh air which usually comes from the cowl.

 

what kind of car is it?

 

It is my 1986 f150 and the cowl looks good and the fresh air ports are on the sides by the door the water is coming from under the dash I think from where the heat comes out

 

check the gutters along the door... i want to say that Ford had problems with the body seams and they would leak down the A pillars into the side panels...

take the interior A pillars off and run water on the outside from the rear of the truck to the front..