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Amtrak and HEP
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Tonight I went to see Amtrak. A few minutes after it arrived, the conductor went to the second engine (which was idling at a high RPM) and killed the HEP, this caused the RPM's to drop considerably. After about 30 seconds, the engine's RPM's accelerated slowly, but not to the previous level and the HEP was turned back on. I have seen this occur before while Amtrak is stopped at the station. What causes the engine to get to that high of an idle? Does it have anything to do with HEP?
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