[WorkInProgressK]

Does the symptoms persist with the fuel pump relay by passed? Forcing the fuel pump to run at 100% all the time direct from the battery. This sounds like a weak fuel pump needing more amps to run or clogged fuel filter(most have bypasses, so it be hard to diagnose). Modern cars tend to send a little less power to the pump to make them waste less energy. From experience, my 240sx's from the 90s, would limit current to the pump at partial throttle. Now with forced induction you need more fuel at that partial throttle so it would lean out. I rewired it direct, bypassing the original relay.

In your case it's just to make sure its fuel related. Then keep up with the maintenance and if it does it again, maybe the fuel pump needs replacing. High flowing pumps tend to be cheaper alternatives. Something like walbro255 could do the trick and be cheaper then stock.