I am have a little trouble with my 1995 5.8 liter Bronco. It starts just fine, but then I drive a little ways, and it sputters and chops and idles very low (about 500-800 rpm). When it does this I have almost no power, my voltage gauge bounces and my battery light comes on. It clears up after about a minute and runs fine. I have recently had a tune up, and I don't really know where to go from there. Any help would be greatly appreciated.