Update for those following at home. We have been having cylinder 1 go cold shortly around 5.5 to 5.8 seconds into each run since we started Friday. We had been progressively ruling out potential issues as we went to diagnose the culprit and today after E1 we did a compression tested and found cylinder one has low compression, like 40psi low. Exhaust valve 2 appears to be not sealing so we elected to drive the big girl into the trailer before any major damage potentially occurred. To run as well

Ford 4-Cylinder EcoBoost Engines are Failing Says Ford Mechanic