I have a 3.9L 2004 Mustang, Im in the Army and while stationed in korea (1 year tour) my parents have been looking after my car. (i say looking after like keeping it there not starting it every week) So since it has been sitting for a while and im comming home soon, they decided to start it up and charge the batt. well while idling for about a half an hour it dies and they couldnt get it started again. Could this be the Fuel filter being clogged up? this has happened to me before where i was just sitting in a park idling and it dies and takes a couple of times to restart it. then mashing on the gas pedal to clear out any obstructions in the fuel lines and it usually works>

Im at a loss, could it be that or something totally different. Please, any help is welcome.