Thanks for the heads up on the spark plugs. Mine has a rough idle (37k) sometimes too.

 

My 09 only has 4k miles and sometimes idles a little rough at a stop light. It doesn't do it enough that it seems like it might stall or something (not even close), but it's obvious that it's not idling perfect. It has only done it maybe 3 or 4 times so far.

 

I have this happening also.....first couple of times I thought it was going to die....hasn't been doing it as often lately??? Sounds like I may need to order some new plugs. Thanks for the write-up. As with most all of the other problems the JK has....it is nice to know you are not alone.