Jerky acceleration

Hi Ken,

Yes, the engine had spark plugs replaced at 102,000 miles at a local Honda dealer. I assume they performed all tasks necessary/related for a spark plug replacement but do not see any line items for additional service on the invoice.

One item I know was not replaced are the ignition coils. I have not had an opportunity to inspect them but will do so in the near future and report back my findings. As far as the other tasks to perform during a tune up, I believe the fuel filter is in-tank and the engine air filter is clean (new as of 5,000 miles ago). That leaves cleaning the MAF sensor and throttle bore. Based on the symptoms described in my original post (jerking during acceleration while changing gear) can it be narrowed down further? I should clarify it is most noticeable with Econ mode off, in my original post I said it was while Econ mode was on.

Thanks in advance!

Small update to this:
I found a tear in the intake hose after the MAP sensor but before intake manifold. Replacing this piece seems to have taken care of jerky acceleration.

Now that the initial problem has been resolved I have noticed another: vibrations while accelerating between 45-55 mph or maintaining speed at 55 mph. As soon as I take my foot off the gas during that speed range or maintain speed higher than 55 mph, the vibration goes away. I am not really sure where to start with this one. The CV boots are not torn (but the drivers side axle was replaced recently), I cannot find any other vacuum leaks. Could this be a symptom of the the passenger side axle failing?

Its worth mentioning the CEL has never come on in this vehicle. So correct me if I am wrong, but scanning for codes would yield zero results, correct?

Thanks again for any help.