I have a 2015 with the 2.7 and a little over 13k miles, and over the past month or so the overall ride has been extremely rough with a lot of jerkiness and hesitation, especially at low speeds. It's nearly impossible to drive the truck smoothly.

There are no codes and the dealer gave the standard "could not duplicate customer concern" so they didn't really investigate. Any ideas before I bring it in again?

 

Have someone with a code reader read for Pending codes

 

boost/vacuum leak? Bad tank of gas?

 

At one time I had noticed a rough idle and what seemed a hesitant get up and go, I had all the air filters replaced ; although maintenance was not scheduled for another month or so . My motor smoothed out and is running great

 

My 2.7 has 32k miles on it, and it had begun to run a little rough at idle. Oil change and replacing all the filters helped. I noticed it really smoothed out while running premium gas. I had a bad tank of Fred Meyer gas a while back, and it stuttered and sputtered for 500 miles till that was gone.

My next step is to replace the spark plugs since I've heard the 2.7 is kinda hard on them, and rough running might be an indication that they're incorrectly gapped or cracked.

 

why would you run ****ty FM gas--everyone should be running Top Tier gas (there is a list) like Chevron, Shell, Costco ect.....the TT gas has the required and above cleaning agents and other goodies

 

I have my new iridium plugs and will be installing them this weekend, I have 18800 on a 2.7 2016, that is not running like it was new, fuel economy has dropped as well. I have changed the air filter already.

Mine sure does feel like new plug time, I will know in a couple days for sure..

 

Post up pics of the spark plugs. I'm curious as to how mine look after the new head rebuild. I need to pull mine after we get back from our trip this coming week and see how they look

 

I try to run Chevron consistently because I like their additive package. Fred Meyer, Arco, Chevron, Shell, they're all the same gasoline. I work nearby a fuel dump, and I routinely see refueling trucks pull up and fill up out of the same fuel storage. Some trucks say Arco, some Chevron, some Safeway, some Fred Meyer... all from the same tank. They then proceed to add their own proprietary additive package to the the fuel and go off to refuel the local gasoline stations.

ALL the fuel I buy for my truck comes out of that fuel dump, whether it's from Fred Meyer's or Chevron. And ALL the fuel you buy for your truck comes from the same place as well, no matter which station you prefer. It all comes down to which detergent package you prefer.

In a nutshell, that is what top tier gasoline is. Simply a higher concentration of detergent additives added to a base stock of fuel.

I figured I just pulled fuel from a contaminated storage tank that one time.

 

Thanks for the suggestions everyone, but I still haven't isolated the problem. No codes (or pending codes), gas is fine, recent oil change, and a new air filter and it still runs terrible.

I have an appointment with the dealer next week and will report back in case anyone else has a similar problem.