I have a honda that when it sits it will start and run like new, but after 20 min it turns off, does not hesitate just turns off there are 2 codes that come up o2 sensor and injectors. So this is what I replaced the distrubtior, plugs and wires, injectors, fuel filter,oil, air filter, fuel rail and pump. And checked all the fusses and relays. What is going on?

The PGM-FI Main Relay may be the source of your problem. Cold solder joints may be separating when it gets hot. I recommend replacing them every 120,000 miles or 10 years, whichever comes first.