2007 Dodge Magnum poor acceleration

my problem seems to be when I accelerate slowly my car seems to bog down I can correct the matter by stepping on the gas hard,seems to bypass it .no check engine lights have come up .OnceI get past the initial take off the car rides fine.again this is only when I first take off I believe it is has nothing to do with the shifting .any help or suggestions would be greatly appreciate it I have had this car since day one and this is the first time I've had a problem.I did change the air filter