I have what i can only desccribe as some sort of growl coming from the engine compartments of my 2000 GTP. It happen shile accelerating heavily. In order to try to narrow down the possibilities. It kind of sounds like one of the pulleys is vibrating but I none of them seem loose. I can make the sound happen by putting the car in drive and applying the brakes and gas at the same time. It starts right around 2000 rpm. Im going home next weekend to try to track it down further. Just wondering if anyone else has ideas or have run into this niose before. Thanks