If you don't want to learn this stuff and just want to fix your truck? It's hardly worth the cost of a laptop just to data log for a issue like this.

Seriously the fuel pressure being low is most likely the issue. New pump and all the parts does not mean they are all good. Heck you could have plugged up a filter?

Most auto parts stores have loaner fuel pressure gauges. Your truck will have to be hooked up underneath at fuel filter. May as well buy the filter while you have it apart to test pressure!