I took my 97 stang to the ford dealership to get 2 keys made (Did not have them when I first bought it) they also replaced the transporter or whatever it's called that goes in the ignition (I'm new at this). They said that they had the car running and after 5 mins the car shut off. They are wanting to do a diagnostics. My bills is already $400, and not planning to spend more. CAN YOU GUYS HELP ME PLEASE!

Your help is appreciated