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I just bought my truck a few months ago, this is my first diesel and I am very happy with it. I've been looking into getting the high idle and 3 cylinder high idle enabled on it and getting the fooler as I am tired of waiting for it to warm up. My concern is does the 3 cylinder high idle wear 3 cylinders more than the other 3? Does the firing order alternate when in 3 cylinder high idle? I just don't want to tear the engine up. I would think that if Cummins included this in the software that it would be ok to use, after all they are the experts.