My car is a 2017 Accord V6 with a 6-speed automatic transmission. I've noticed at 75k miles that it doesn't seem to run as smoothly in acceleration as it used to. Seems like a bit of unsmooth gas flow to the engine especially up a slight incline. Instead of a steady increase it seems to speed up and slow down during acceleration, as if something is trying to catch up in the transmission of power. Has anyone else ever experienced this with their Honda? Some things I've thought of is valve issues (carbon build up), spark plugs, unsteady fuel flow, & tranmission issues. Does the dealer have any kind of diagnostic machine to check it out?

Any input is appreciated.

 

Was any work done on the car not long before this happened? Along the same lines, did this happen suddenly like after filling up with gas, or did the symptoms gradually appear?

I'm sure a dealership can put a scanner on it to look at engine and transmission sensor inputs. Is your check engine light turning on while driving or is the D4 light flashing?

 

No work done before this happened. It was a gradual thing. I've never liked the way the transmission changed, but this feels more like uneven power. If the dealership has a diagnostic machine that would be great. Thanks for the input.