I have an interesting problem that i have been unable to find any help with. After installing my Starmate 8 in my 99 Suburban, I get a full meter on the satellite signal meter as long as the vehicle isn't running. As soon as I crank the truck, the signal drops to one bar and then steadily bounces every 1 second between 1 and 3 bars of signal. Back and forth, back and forth and the audio cuts in and out naturally because of the signal drop. As soon as I kill the engine, the signal goes back to full strength. Any clue??? IT'S DRIVING ME NUTS!