2007 Dodge Caliber Car putters when stopped at a light for

I've had this issue for some time now. At first my car would sort of hesitate when accelerating. I was told I needed a tune up, which I did. Then my car began stalling at stop lights. I was informed I had the wrong spark plugs installed, they were changed and the stalling issue has stopped. My car still hesitates when accelerating, and occasionally it sputters a little when I am stopped, but never shuts off. This only happens when I am stopped and the car is still in drive, when driving or when the car is in park, I have no problems. I was told this may be an electrical issue, but it's been an issue for a year that no one can seem to find a permanent solution to. Please help.