Mine does it too. Been to multiple dealerships who can’t find a code, or an issue. Feel it in the seat. No misfire, just seems like an odd fire sequence, or retard timing.Same issue on my 2021 platinum 3.5EB Has 12k on it now. Techs said it was normal, I put my foot down to get some answers. Walked away with a free 100k mile bumper to bumper warranty to “ease my mind” we shall see. Never had any issues with my previous 2.7 eco boosts.
My '21 3.5 EB gets filled with 87 octane regularly. Every once in a while I'll notice a rough idle. Not enough that the truck is shaking badly, but enough that family noticed and commented. I was at 3/4 tank and topped it off with 93 when that happened and I feel like the roughness went away. Could have been in my head though.
Lol I’ve been telling myself that for 2,000 miles. Again, not enough to vibrate truck or hear a miss, but enough vibes to feel in seat/door panels. Sometimes it’s not as bad. But again best truck other then that
Yea I seem to read many posts saying the same. And others say it’s not normal. So at this point who really knows. Very annoying. Possibly a deal breaker for me. But time will tell. Such a shame because the truck drives flawless other than the idle.
Doesn't make a bit of difference. My 3.5 PB idles like a 40 year old diesel.
The new truck doesn’t do this?
I noticed the difference in shuddering when in boost. Idk about the idle quality difference.
The new one is a 3.0 Powerstroke. Smoothest idle ever ??
I've been running 91 octane (premium in Colorado) in every tank. I haven't noticed any shuddering while accelerating. Perhaps that's due to running premium fuel.
Which configuration do you have? Powerboost? 2.7?
