I have the very same type of problem. Engine at idle...like at lights...just stumbles for a second, almost like something turns on and loads down the engine for a second. I've had it since new and now have 11,000 miles...but still have the same problem. I've tried different make gases, and that does not help. The idle is set about 500 rpm...i wish it was set at 550-600 rpm. Does everyone's crossfire idle at 500 rpm? I was told that this can not be changed and it is set by the computer.

The engine stumble is obviously not a major problem...but it just makes you feel bad when it happens...since this is such a great car and do not expect it from such a quality engine...and I really enjoy the quietness of the car when I just want to unwind.

I am still searching for a cause and solution for the problem. Dealer says its normal. I know from this forum that some owners have it, and some do not...so there must be some adjustment that can be made to eliminate it. I hope someone posts a solution to resolve this problem.

Thanks