yesterday evening, my manta begins to make a funny noise, only lasted a few seconds so i blamed it on the transmission, like i always do .....but later on last night coming home, it came, and did not go away. shut the sterio off to hear it better, and to my surprise, my speakers were whining, with the sterio OFF!!! its a 200W pioneer deck less than a year old, 500 watt jensen amp with 2 10" jensen subs and some nice little jensens in the rear deck. the whine was in tune with RPM of the engine, and i ended up unplugging my sterio from the fuse block to get the noise to stop. the origional AM radio did this in my GT, and heard that sometimes the condensor on the dizzy can do this? i have the pertronix unit so i can pretty much rule that scenario out, but what would make it start this?