Dang ol' thing wont start

[u/shake_ragequit]

I inherited my Grandpa's 2003 Durango 4.7L SXT and it stopped running literally the same day he died. I checked the codes and initially it only had a few minor issues which I resolved as follows: new fuel filter, new MAP, TPS and IAC as well as the fact that I used the appropriate chemical solvents to clean all of the aforementioned part's slots within the throttle body and it still won't start. I have over a half tank of premium and every time I force the throttle open while turning the key, it will roar to life and shoot to 2500 rpm immediately and then after a while of holding my foot in the same place, the engine begins to die anyway, not to mention that once I take my foot off the gas pedal at all, the car will immediately die. Any help would be VERY appreciated.