I took my 4.6 V8 Mustang GT 2005 to the dealer yesterday with the problem in the subject. They replace both fuel senders, the one with the fuel pump included and the other one. Working fine until now. Just in case have this problem there's the solution. Also they changed the Throttle Body because the car was having low RPM in idle that cause the car to turn off. Hope this help anyone out there. Don't loose the fate on the Mustang!! I know is frustrating paying more than 30k's for a car that it's having this kind of bugs.