I have a 97 Grand Prix GT(3.8L)(150,000 mile) with a lot of problems lately. I just replaced the ignition switch and the starter, but now it won't start after sitting for a while. If I jump the car, it starts instantly. I can then drive around for a bit, turn it off, and it'll start up like new everytime. However, when I leave it for a bit..it won't start again. It has the clicking sound like the battery is dead. But if the battery was dead, it wouldn't start so quickly when being jumped. Any suggestions???