I was thinking about this....I still have my stock MAF sensor. Does anybody else that is experiencing these problems still have their stock MAF sensor? I was thinking the majority of people on here probably have K&N filter. I have had mine for almost 5 years and my MAF is getting old(10 years now). I am wondering if the oil may be getting the MAF dirty and causing a less than smooth idle? I have cleaned my MAF with air intake cleaner before, but maybe it is loosing its sensitivity. I would change it, but for a stock replacement it is around 140 to 150. Just curious.