1997 Oldsmobile 88 engine wont start when hot

when car is cool cars starts the way it should when car is running for about a half hour or so cars dies out and wont restart till the cars cools off when the the gets hot and shuts down the power windows and power seats dont work until the car restarts when cool....when car is running fuel pump is working fine when car gets hot and quits and just cranks the fuel pump is not working or not making any type of noise until it cools off then its starts right up with everything working in order......