Engine Surge is Driving Me Crazy

[babysvt]

I have an '05 4.4i that has an engine surge. It only seems to happen after the vehicle is warm and only noticable when I come to a stop at a stoplight. I have already taken it in once to the dealership and they are telling me this is normal. It doesn't always do it. Sometimes when I come to a stop it doesn't even feel or sound like it is running. This surging is driving me CRAZY!!! It is a really heavy surge.

Is this normal or has someone else had this problem and know the fix?

Thanks,

Tracy