My ESS was acting up, new batteries, I am convinced it was related to coils and the electrical system sensing they were bad.
Right or wrong, fixing #3 made it go away. ESS working fine. Weird system, these trucks would be better without ESS.
Yeah I’ve seen worse too but they were nasty! I also replaced the coil packs.
#3 cylinder misfire is no more, CEL code cleared and she’s running just like a song.
Just hit 101,500. 2020 JTR
Cylinder #3 misfire starting. And of course throwing the code and CEL.
I have a set of coils and plugs here, but I’m hesitant to dig in (intake/plenum removal to access coils, major PITA) and then find out the coil and plug replacement was in vain.
Sucks. Really...