I have a 92 f150 5.0 xlt lariat 4x4 . And. I just had the problem start where my truck will crank and run fine but my fuel pump is running non stop and it's loud and when I start to drive my truck it starts to act like it's starving. For fuel barley. Stays running and if I switch to my rear tank the truck starts to run fine like nothing is wrong is this a bad fuel pump or something else

 

Welcome aboard! Maybe start with fuel pressure test.

 

the fuel pumps in your truck are notorious for failing...