Hi, my 2018 GT RWD 3.6L V6 has now 133k miles, I bought it few months ago and noticed this issue soon after I got it. Initially I was getting misfire code out and the start/stop warning and by reading around here I figured out, I changed the VVL solenoids, also did a good engine flush as I realized the previous owners/dealer were all a**holes, because the oil filter was horrible and I think I get a lot of sludge buildup inside. Once I realized they never took care of it, I also changed all the spark plugs. You can see some details in my previous post here https://www.dodgedurango.net/thread...-warning-on-with-rough-idle-and-misfire-vvl-solenoid-seepage.86681/#post-866895.
I have to say things got generally better after working on it, at least now I don't get the start/stop warning anymore, and also the misfire codes didn't come back.
Nevertheless, I still have an annoying issue, this can be roughly described like this:
Any ideas or similar experiences would be nice to know, I would still try to see if there's something I can do before thinking I need maybe to tackle the rocker arm issue?
Thanks
I have to say things got generally better after working on it, at least now I don't get the start/stop warning anymore, and also the misfire codes didn't come back.
Nevertheless, I still have an annoying issue, this can be roughly described like this:
- randomly and only sometimes, MAYBE after the car has not being used for a while, when still cold/just turning on, the idling can be very rough. Th rpm gage is stable, it is just you notice it when sitting in the car. Weird, during a recent long trip (i.e. car was not cold) stopping at a light after a long highway ride, it also started to rough idle, but then it disappeared soon after and didn't come back for the next several days. No codes are thrown.
- this happens very constantly and repeatable: when gradually accelerating from stopped, engine revs up OK in lower gears, in auto maybe goes up to 3k and shift smoothly, all good, but if you're cruising in a higher gear, say 70 in 8th gear on the highway, and there is a hill, at that point if the engine load becomes bigger, the car will shudder and will totally feels like there's misfiring if you're in the 1600-2000 rpm range. If you put it sport mode / downshift to 6 or 7th, obviously rpm range is changing, and engine sings perfectly not problems. I did this like 10 times in a row, on a hilly area with a lot of ups and downs, once the road was starting to climb, I'd be ready and downshift myself so the rpm range would be around 2500 rpm and never an issue. I admit that a similar issue can be found if the rpms go higher say above 3k rpm in high gears, so it seems there are "preferred" rpm bands where it can work perfectly.
Any ideas or similar experiences would be nice to know, I would still try to see if there's something I can do before thinking I need maybe to tackle the rocker arm issue?
Thanks
