I have a 2012 with the 5.4L.
Persistent, intermittent P0300, p0301, p0304 codes.
Mostly at idle.
Note: Some miss fires on 2 and 3, but below the check engine set threshold. No miss fires on bank 2. (5-8).
Following has been done:
- new plugs on 1 and 4.
- New coil packs on 1,2,3, and 4.
- New...