I have to sell my car!!!!!

[90pos240sx]

I have to sell my car. BUt before I can I need to figure out what is wrong with it. My car will start just fine but if I drive it for 10-15 min. the car will lose RPM's and just totally die. I have power to my lights and radio and stuff like that. After it dies, I'll let it sit for about 5-10 minutes and it will start back up and get me home. Does anyone know what could possibly be wrong with it?? :help :help

[Meantime]

Let's start from the beginning here...

So let me get this straight. Your car is fine while it's cold, but when it warms up it dies, and then you have to let it cool off again before you can restart it.

Does the idle shake/wander while it's cold?

Is it running rich? (black smoke)

more info pleez.

[90pos240sx]

I'm not sure. I don't know to much about cars and my lazy a$$ boyfriend won't help me. I haven't driven it in about 3 weeks. I have to go get it today from my friends house and try to drive it to my mom's. I will try to pay attention to what you just asked. Then I'll let you know. Sorry for the lack of info.