Gary Cole Posted July 6, 2021 Share Posted July 6, 2021 There was an interesting topic on another forum discussing a new owners complaint that his ISL 400 Cummins lacked power when climbing steep grades. Not being a member I didn't comment. However, I was surprised at the number of people who recommended that he approach grades at full rpm with pedal to the metal and keep it that way during the entire climb. Perhaps gaining a minute or two in the process. Not to mention consuming fuel like he had a hole in his tank. My comment would have been that making a habit of operating a diesel engine in that manner would be the best diagnostic tool available if one was intent on eventually discovering a hidden, potentially catastrophic, weakness in an engine or transmission. A flaw which otherwise might have remained unknown for the life of the coach. Link to comment Share on other sites More sharing options...
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