The car cranks but it does not start. I can easily hear the petrol pump sound

Hello, Intermittent problems can be very difficult to diagnose, and this is one such problem which needs to be scan tested. You could have an issue with the coil pack when they become hot, an EVAP system purge valve stuck open, or even a faulty fuel gauge that shows fuel though the tank is empty. A technician may request that you leave the vehicle at the shop overnight so they can start it first thing, and when it does not work.