My `04 Duratec Taurus suddenly started smoking under the hood today and when I was able to pull over and raise the hood there was nothing noticeably wrong. None of the idiot lights came on and the brakes weren't dragging but I did find the above pictured piece of rubber lying in the frame just below the A/C compressor pulley. There were several other small chunks of rubber lying there also but this was the largest and only identifiable piece. It's definitely burnt on the bottom but I have no idea where it came from. Any ideas?