My wife's 2014 Expedition randomly won't start. I replaced the battery and checked the alternator and starter. Both are working properly. I took it to a repair shop, but they could not replicate the problem. They recommended checking the key fob thinking it could be an auto theft problem. We changed keys and it happened again. Any suggestions.

 

1. Test the fuel pressure
2. How many miles since the spark plugs were changed?
3. What is the Theft light on the dash doing as you attempt to start the engine?