Recently acquired a 2012 F250 Super Duty 6.7L diesel. Primarily to travel with a 33’ travel trailer. Love the truck but with the colder weather setting in she sputters when I first start her in the morning - only for about 10 seconds, then isles just fine. Looking for answers.
With that generation of beast, chances are good that the computer is complaining about something, so consider getting some software and a cable to see what is going on in real-time.
From the description, initial reaction is that at least one glow plug (GP) is offline / dead.
Welcome. If you can do a youtube video and post a link, would be helpful.
Running rough a few seconds when really cold isn’t bad.
How cold?
How long did you plug it it?
What is coolant temp when you start it?