I've been having this problem for quite a while and it's getting on my nerves lately, plus it's embarassing. When the car is started and the engine is cold, it produces a high pitch whine or whistle similar to a jet plane on the ground. The noise goes away abruptly after one minute if it's a hot day, on winters it takes a while. The noise seems to be located near the alternator, if it were the bearing I guess it would be constant. Someone told me that it could be a vacuum line with a small hole, if it's the case how do I find the proper line? Where to look in the CD manual

Thanks

Mike