Just changed my spark plugs and oil the other day and my JK had been running fine. Today, while at a stop light I notice the engine seemed to be shaking. The jeep was sluggish on acceleration. When I hit about 50mph, let off the gas then stepped on it again, the vibration was very noticeable, perhaps stronger than when I was idling.

The only think I didn't do was change my spark plug wires....do you think that had anything to do with this or should I be looking somewhere else?

Thanks for any help!

 

I have exactly the same issue. The dealership is working with Chrysler engineers now to resolve it. Let me know if you find the issue. I'll do the same

 

Did you recently put gas in the tank? Could be water in the gas.
The only time mine behaved that way was when the dealer put watery gas in the tank after installing a new tank.