2004 Chrysler Sebring Sebring will crank but will not start

My step daughter was driving her car and it suddenly stopped. At first it was not displaying any error codes when I would set the parking brake and cycle the ignition 3 times. I didn't hear the fuel pump click when the ignition was turned on and I did check the fuses and they were all good do I replaced the fuel pump, however now I can hear the fuel pump run but it still will not start. I checked the error codes again and this time I had an error code of P0108 which is the map sensor. I replaced that too and it still does not start. I did check for spark and all plugs will fire and the plugs were replaced too. Now I am just guessing and I replaced the crankshaft position sensor since it was the cheapest sensor. Now it wanted to start but it didn't. I then checked the error codes and I had a throttle position sensor code listed P0123. I replaced that and it started. So my step daughter was going to go to our house and about two miles from her house the car died again. And again it will not start. I pushed her to the gas station and we put a little gas in the car since it was low but now out. Then it did not start again. A couple of minutes later it started up again only to die a mile down the road. I pushed her the rest of the way to my house and double checked all of the electrical connections. So before I replace the camshaft position sensor could I cause a problem like this? Any help would be appreciated.

Brian Skurkis