ISL not performing
OK you diesel experts, here's what's going on. I have a 400HP Cummins ISL in a 2005 Itasca Horizon motor home. I've had this coach for 3 years and it's performed flawlessly. Last winter I had a die...
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My experience was the same as yours with my Cummins engine. It was a Turbo Speed Sensor. The turbo boost gauge would do exactly as yours but not produce any power. The service center I stopped at in Wyoming diagnosed the issue incorrectly and cost me $300.
