Fuel pressure problems and code 111

I am having problems with my 1993 Ford bronco/5.8 auto with 117,000 miles on it starting after sitting for 6-8 hours. The symptoms consist of with koeo fuel pump runs for a couple of minutes to build pressure then truck will start and run good all day unless truck sits for a while. I have changed the in-tank fuel pump, fuel pressure regulator x2, fuel filter, 02 sensor, throttle position sensor, temperature sensor, MAP sensor, air sensor and a complete tune-up. I also did a diagnostic with hand held and also jumper wire to check for codes. The code 111 came up for all good. Did check fuel pressure on fuel rail and it was good at koer. I also checked the resistance on injectors and that was good. I also did check vac on intake. Thinking leaking injectors? Help! Thanks.