I have a 1991 gt, it wouldnt crank over, so I jump started it, a few minutes later it died again. So I took out the battery and alternator and had them tested, they both passed, I replaced the alternator anyway because it sounded like it was going out, and had I the battery charged a little. Still after a bit of driving it started to lose charge again. I followed all of the visible wiring and couldn't find any signs of corroding, my connections look ok, my grounds look fine. The only thing I could think of is to replace the battery anyway. Anybody know what I should do?? Thanks