This has happened 2 time to me so far with in the last month. I have my window down and I roll it back up. The window goes all the way up like normal then it goes down about half way. It will keep doing this untill I open the door and roll the window up. Any idea what can be causing this problem?

 

That happened to the passenger window in my Z, took it to the dealer and they said the motor had gotten dirty, they said they cleaned it and it has worked ok ever since.

 

There is a TSB out for the window motors. Take 'er to the dealership. They should fix it at no cost.

 

Mine's doing the exact same thing, but every time I make an appointment with my dealer, it stops acting weird, and I look like a tard.

 

Don't underestimate youself....You're an incredible tard!! (A very loose quote from Rodney Dangerfield to "Judge Schmales" in Caddyshack, I couldn't resist!!!)

Seriously though, it shouldn't matter that it's an intermittent behavior. They should take action based on your description of the problem, especially since there is a TSB out for this.