Hey guys and gals. First post and I need some help. Had a 90 gt a few years ago sold it missed it and got a 2003 gt 5spd last week. Car has 20,000 miles on it. Here is the problem. When its running I hear this light knocking noise that sounds like its coming from the dash. I turned off the heat and air but its still there. when i get out of the car it sounds like its under the car but is more of a whistle sound. When im driving i cant here the knocking but you can here the whistle sound. i does not sound like it should be doing that. any ideas?? cant wait to start adding stuff to this car but just want to make sure its ok first. Thanks