Last night while driving my car completely switched off, parked on the side and started several times but not starting. Its cranking but not starting as if it run out of fuel, But fuel tank was full. Its European version and i am in Dubai and Lexus dubai not helping much.

They checked that battery, and engine is fine as car started from external fuel thru fuel injector cleaning supply system.

Now nobody knows whether in which part of fuel assembly we have a problem. Whether its in pipes and hoses, or the pump is gone or some relay is gone.

Is there any way to diagnose it further, any help is much appreciated. I need to find out what next should i do?