REV-X WORKS MIRACLES!; 6.0 Running Rough Cold

[@torquemonsters4640]

I know, that is an aftermarket oil filter cap. Don’t worry, the cap was replaced with an OEM motorcraft cap and the drain tube was replaced as well.

[@kellyh4035]

I would also check the FICM voltage as well.
I had mild stiction issues that I thought was my problem but the FICM was getting weak and caused more problems than the stiction

[@poorboysedcandflashlights5934]

I changed the oil in my 6.0 yesterday and it runs like shit simply after an oil change

[@tavindehart1941]

Yea mine did that too it evens out once the oil gets the carbon in it