My 2.4 did that once and I changed gas stations and it hasn't done it since. But there was another person that also had the stuttering and I believe they posted on here. If I find the post I'll post it here.Swanker said:I've notice now a couple of times with my 2.4l that when i idle it in park it sometimes studder. One time it studdered and stalled out in idle. What could cause this? Crappy gas?