2022 Ram ecodiesel hard start issues after driving 2 hours

[Doctor D]

help ! truck is acting up again after driving hot day I stop and get back in truck after eating and start it up it might do a hard start and turn over 3 or more seconds after push to start function . once it does start it with run rough at idle and then die and electronic throttle service light and check engine light will come on, I will clear codes and drive at highway speeds and it is fine until I kill it and get back in and sometimes it will run ok and but really acting up with hot weather . replaced lift pump and recall on High pressure fuel pump already . also replaced fuel filter after lift pump . going to pull MAP off and clean if I can find it on GEN 3 . might be another sensor somewhere like EGR but need location . hoping I might get some help here ! thx! Doctor D , codes are low fuel rail pressure but I think that is false readings .