Welcome! You're not alone as most have had the same issues. I'd recommend reading the Settle Forum for more information around the recall/settlement for EcoDiesel owners.
https://www.ecodieselram.com/forum/forums/ecodiesel-settlement-information.36/
Welcome! That's a very likely scenario based on the previous posts we've had here. Have a look in the engine talk section as we've got a few threads here on this issue.
We've got a million threads on this topic here with a few names of people that might have what you're looking for.
Try searching "tuning".
https://www.ecodieselram.com/forum/search/84038/?q=tuning&o=date
Welcome, a few topics around additives here.. and really most just use what they think is good for the truck. I've used a few, but I'm not sure if it helped or not over the years...
Welcome! If you really want that update.. taking it back to stock really is the only choice. Not sure it's worth it as most hate the update and it seems some are catching fire now (post update, which is weird...)