i have a 2016 that is doing the same thing, as well as, surging up and down when cruise control is set. My plugs are gapped at .028 and i even replaced them thinking they may have fouled out. It does this with the 87 tune, and the tow tune. Resetting back to original the problem is gone. anyone else ...

Thanks Matt.

Am new to this forum and i am wondering.. i changed muffler to a flowmaster and added a k and n cai on my 2016 f150 3.5 ecoboost. Will the diablo tow tune work well in my truck with these mods or do i need a custom tune? very new to all this so any advice would be appreciated.