I have a scanner on my tuner but its not picking up on any codes which makes me feel ok about it but its still a bit concerning that its blowing white smoke when it used to be black. Is there an easy test/fix for the EGR cooler? Definatly a wierd problem though because it seems to have become intermittent. It was puking about a week ago, stoped, than started puking again today. I drive 50-100miles a day highway so it doesnt sit either.