I am looking at an 06 f150. There is some kind of leak comming from the lower driver side windshield. When you start the truck you can hear engin noise comming from there. While driving it sounds like a window is open and if I put my hand ther (lower corner of the windshield) I can fel cold air comming in. Has anyone seen this before?

 

i had an 04 xl reg cab that had that problem on the car lot where i managed. it was a simple repair that any glass installer can do.
jim

 

from what you have described it sounds like the w/s has been replaced and and the adhesive that was used is not making proper contact with the glass and body to seal out the wind noise. On more serious side the built in safety features of your truck can be seriously compromised by that i am saying that the passenger side air bag when deployed will need the window to be properly glued in as the bag will need the support of the glass to properly work. Try to find out through the previous owner who did the replacement and have them back it up as the standard is lifetime warranty if unable to do that take it to a good local glass man that has been recommended have them check it out and and make the proper repairs

 

My neighbor had the exact same problem with a Chevy. After trying many different things, he finally took it to a glass shop and had the windshield removed and resealed. No more problems. Cost was $50-75

 

06, is it still under warranty? Take it back to where you bought it and have them repair it.