2.8 Not Starting

Hello everyone....
This car belongs to my parents and have been given the job to look at the issue of not starting....
The history as far as I known is the car started but randomly cut out but now won't start.
This weekend I thought I would see if fuel is getting to the fuel rail by removing the fuel pressure sensor and turning over the engine. I was hoping to see a steady flow of diesel but didn't.
Not sure where to check next....