I have a Hyundai Tiburon 2000, 5 speed, 4 cylinder. I have already changed the battery and the alternator and when I drive down the road and turn car off at gas station etc. My car will not crank back up without jumping car off with jumper cables. Then I can jump car off and at night I can drive the vehicle and some times it cuts off like the alternator is not charging battery. Then I can leave vehicle and come back and the car will automatically start without jumping vehicle with jumper cables. I have checked the electrical wiring from the alternator and the wires look all good. I have checked the wiring running from the positive off the battery and all looks good. My question is could the starter be draining the electrical system some how. If the starter is going bad???? Otherwise I can not figure this out. PLEASE HELP!!!!! Thanks