You are describing what my 2012 was doing. The day I brought it home 3 hours on the interstate it was a handful, darting to one side or the other. I did a tape measure alignment and found the toe out 5/8” I set it to 3/16 toe in and it became a completely different vehicle. No more constant steering input, you can drive with one hand if I wanted to. I would go under and measure the distance of the tires on the front of the tread and the back of the tread. The difference is the toe. Ford recommends 3/16-1/8” tow in.
