4.2 L V8 When starting cold starts fine. If I restart hot after a few minutes starts fine. After maybe 1/2 hour, wont start firs time. Turn off key and start again and it start but stumbles then Ok. Runs fine.

Would this be from a leaking or dirty injectors? Fuel pressure problem? I don't see a tap on the fuel rail to watch pressure so hard to tell,

Thanks and best regards