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Old 10-05-2013, 03:41 PM   #1
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Adjusting Fast Idle

I've read a lot on how to adjust the normal idle via the smart wheel but I'm curious how to adjust the high idle. Mine currently runs at 1200 RPM. From What I gather this seems a bit high. Thx in advance for any info.
2005 Monaco Diplomat Cummins 400 ISL.

Bill
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Old 10-05-2013, 04:06 PM   #2
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The high idle top speed would be part of the Cummins, Engine Control Module, programing, and re-setting it lower would have to be done at a Cummins facility. ( If possible at all )
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Old 10-05-2013, 08:42 PM   #3
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If you are talking about the high idle that is achieved by using the "smart wheel" cruise control system, then I think 1200 is about right.
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Old 10-05-2013, 08:45 PM   #4
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On our rig with smart wheel th idle will increase to a max of +/- 1200 by "clicking" the SET button and decrease by "clicking" the RES button. But, I agree with others in that the max. is set by the ECM.
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Old 10-05-2013, 11:39 PM   #5
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Sounds like 1200 is where it should be. Thx,,,
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Old 10-05-2013, 11:46 PM   #6
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Sounds like 1200 is where it should be. Thx,,,
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