First off, I want to thank everyone that takes their time to help out others on here.
My mom has a 2000 Grand Prix. It has the 3.8 supercharged. About a week ago she was out shopping (a woman shopping? no way). When she came out to start the car it would turn over but wouldn't start. She tried starting it again about a half hour later and it turned right over. On the way home it died while she was driving. She kept trying for about an hour to start it with no luck. She had to leave it parked on the side of the road. Later that day my step-dad and mom got the truck and trailer and went to get it. When they got there it started up and they were able to drive it home. It did the same thing a few more times over the course of a few days. For some reason my step-dad thought it was the fuel pump so he replaced that. That didn't fix the problem. A friend of mine said it was either the cam shaft sensor or the crank shaft sensor so both were replaced last night. My mom drove the car home from his shop, which is a couple miles from her house and it ran fine. She got back in it a little later to run to the store and she said it didn't die but when she stepped on the gas it felt like the engine didn't want to go and was lacking power.
Does anyone have any idea what could be causing this?
Thanks!