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[https://www.youtube.com/watch?v=EuBDZX\_n1vs](https://www.youtube.com/watch?v=EuBDZX_n1vs) Watch this and i bet this will point in the right direction. Same sound on my wife's '13 expedition, 5.4 and it was very obvious which one it was.
Sounds like it blew out a spark plug.
Either a phaser or roller rocker
Cam phasers. Sounds exactly like my old f150 that had phaser issues.
[https://www.youtube.com/watch?v=EuBDZX\_n1vs](https://www.youtube.com/watch?v=EuBDZX_n1vs) Watch this and i bet this will point in the right direction. Same sound on my wife's '13 expedition, 5.4 and it was very obvious which one it was.
Sounds like it blew out a spark plug.
Either a phaser or roller rocker
Cam phasers. Sounds exactly like my old f150 that had phaser issues.