I am about to purchase a 2003 L with 7463 miles for $22,900 (seems like a good deal). I went to the dealer today and the salesman let me take it for a test drive. When I started it up, it sounded like a vent was blowing but the AC was off and no air was coming out. The sound was coming right from under the dash where the vacuum line is. I put my hand down there and felt a little bit of a leak. However, when i took it for a run, I was still able to produce full boost which I didn't think was possible if there was a leak? Am I right or could you guys think of anything else that it might be? I am hopefully closing the deal on this truck within the next couple of days. Hopefully I can get some responses soon. Thanks!