The car starts, but then it turns off.
I am going to need more info to diagnose this problem. Does the car cut off every time even when you give it gas or does it cut off only when it idles? I would have a technician inspect the starting problem, they can test voltage on a few sensors that may be bad and pull the codes on the ECM. If there are no codes I would look for loose hoses or wires under the hood. Have a tune up performed and check the fuel filter.