Car stalls intermittently while driving

Starts and drives fine. It takes anywhere from fifteen minutes to two hours and the car shuts down, normally while coasting along but sometimes when stopped at lights. Still cranks over and tachometer shows movement. Crank sensor is new. Fuel pump is new. Thermostat and top and bottom hoses are new. Oil, ATF and coolant are fresh. Seems to have fuel pressure at rail when stalled. Doesn’t sound like injectors are opening when cranked. Evap solenoid is ticking audibly. Starts again after thirty or forty minutes, or, remove and replace negative battery terminal and it starts immediately. Have tried replacing fuel and ecu relays, but still the same. Also, I made a bracket and mounted the ECU off the engine block, still stalling though. Worried about taking it to Holden as it may not fault when they’ve got it. No codes/lights are coming up on dash. Check engine lights flickers a few times when stalled, but only when you turn the key on. Please help, it’s my daughters car and we bought it for her, but it needs to be reliable. My wife wants to get rid of it but it otherwise runs well, and I’ve invested hours into it.