Need help with this since dealer can't fine the issue. I have a 2018 2500 3.0 cyl that "misses" when I lightly accelerate. If this were a gas engine it acts like a backfire. It stalls and then kicks back in. It's especially bad at 20-30 mph but also does it when I'm at highway speeds and lightly accelerate. It got so bad that last week I decided to drive it really hard and floored the pedal every time I could. It never does it with hard acceleration. It runs as it's supposed to and smoothly shifts all the way up whatever speed I want. The funny thing is that after driving it hard for several days, it seemed to clear up the issue a lot. Now that I'm back to softer acceleration, it's worse. Any ideas would be gratefully appreciated!