I get this skip too. I also get loping idle. Both are intermittent. Sometimes its there and sometimes its not. Most of what I can find on this could be ICP related or could resort back to the FICM re-flash too. Some of the re-flashes were problematic and caused symptoms like this At least on the 03 on the 04 not 100%. I have a leaking ICP sensor right now I gather since I had the rear main replaced already and its still getting the oil at the bell housing. I am going to replace that first and see if that has anything to do with my issue and if its still there then it will be going to my mechanic.