I’m having this same issue. I read that there might be air in the gas.
In that case buy an ELM 327 Bluetooth scanner that plugs into the OBD 2 port on the underside of the dash, download the Car Scanner app onto your smartphone, and set up the app so that it pairs with your ELM 327 Bluetooth.Hey i know it’s 4 years later but I’m having the same exact issue and I’m curious if u ever solved it. I tested my fuel pressure and it was fluctuating around 39 at idle. My next bet would be to get the sensor considering that’s where the fuel pressure should be. Has anybody else had this issue and if so what fixed it. Really not tryna spend $200 for diagnostics at ford dealership. Lmk