i am at lost of why my 2000 ford focus will run for a few hours then just die? on 2000 Ford Focus

the stiring wheel locks up and the car shuts down. i have changed the fuel filter and oil and other fliuds what else could it be? it seems to do it the most when its really hot out or the car gets hot from running but the light doesn't come on to say its over heating..

Asked by for the 2000 Ford Focus