I have a '96 F-150 w/ 351 4x4. I think this thread answers my question, but want to make sure:

Truck starts, but runs rough on front tank then dies. Starts fine on back tank. Can start on back tank, switch to front tank - sometimes rough, sometimes fine, but get pinging and varying shudder (mild).

Back tank pushes fuel to front tank, but not front to back.

Still a little confused on what my problem is.

Question is: Does mine need a new front pump, switching valve, sensor, etc.

Thanks for all the help.