1994 buick lesabre dies at normal operating temp?
 

I purchased a 1994 lesabre and im trying to get it going as my winter driver. It starts up beautifully and idles great. However when it runs for about 10 minutes at idle or driving it dies. It will not restart until the engine has cooled down. I replaced the positioning sensor that ive heard to replace and still no luck. i got the car for $250 and i dont want to throw an insane amout of money at it in order for it to work. Any help will be greatly appreciated.