I'm new to chrysler. I just bought a 2005 300c with a hemi 10 days ago. I love this car. The look of luxury with the power of a hemi. The other day. I accelerated quickly to get out of an intersection and the car started bucking as if I had taken my foot off and on the gas. The check engine light came on. This morning I brought it back to the dealer and they said the camshaft sensor needed to be changed. They fixed it. The light is off. But again today as I accelerated up a hill I got the bucking again. I wanted to get some advice here before going back to the dealer. Could this be a faulty EGR valve? Sometimes dealerships just see me as a woman and not someone that knows anything about cars.

 

The best and really only way to diagnose a car these days is to hook it up to a proper scan tool and see what diagnostic codes are stored in the computer. Generally, if there's an episode of the engine missing badly or the transmission slipping, one or error codes will be set and stored. A Chrysler dealer will have the proper equipment but many independent garages will also have the right equipment. Parts stores may also have code reading equipment that they will use to read codes in your car for free but their equipment may not be as sophisticated.
There's not much point in long distance guessing by people here who have never laid eyes on your car. The car is now almost 10 years old and it would not be unexpected that it would have problems.