I've had a recurring Hot Start problem, after replacing fuel filter, fuel pump check valves, and accumulator (confirmed good fuel pressure to FI system).
I can start the car after it's warmed up, by feathering the accelerator pedal (like 1970 T-bird). I've ruled out vapor lock, and it appears the engine is flooding during the initial Hot Start (ignition catches and then won't start without getting more air through the throttle body.