Factory Installed Anti-theft

my sisters ex had a stang do that to him all the time.. even a day AFTER he took it to ford to get a new key or the key reprogrammed or whatever they did. good luck. let us know what you find out.

Doug,I talked to one of the tech's here and with out checking it out he said it sounded like the engine immobilizer tranceiver like Nick said.Part number is 1L5Z-15607-AA.hope this helps.Michael