I've noticed mine has been acting weird at idle at times it would lope for a bit then go back to being smooth. The other day my car would not even idle at all, after I pulled out of my drive way I got to a stop sign and put it in neutral and the car stalled, I started it back up and kept driving got to another stop sign same thing happened then it happened one more time before it was idling normally. Any ideas on what would cause that? Earlier that day I found 2 vac lines right below the intake manifold that came unplugged they were connected to that little red air release module that has a black circle piece on the end of it but it should fix the problem since I reconnected and secured them, so I don't think that was the cause.