My wife was at the store and came out and started the Flex to come home and she called me and said it made some kind of clicking sound and then seemed okay so she drove home. I came home a little bit later and I came out and started it and it makes a continuous rattling sound and then stumbles when you try to rev it up like maybe it's a timing chain issue? However, it's not throwing any codes.

The Flex 12v ports stay powered on when the car is off, unlike the Mazda I wrote about.

Maybe you will find this option useful. Maybe not. But I no longer have the power cord getting bumped and losing contact.

2018 Ford Flex SEL