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Thread Title:

N14 poor idle


Created On Friday July 20, 2012 05:23 Diesel Talk
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gatordoc903
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Posts: 20
Joined: Oct 2010

Note Friday July 20, 2012 05:23 View thread in raw text format
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I've got a N14 that acts like it has a miss at idle and up to 1300rpm you can't hold the rpms steady. It runs good other than that, tps has been replaced Did a cyl.cutout test and as soon as you go to the test screen in insite and hit the start button the engine runs smooth. All cyl arehitting good and as you exit the test screen it starts to stumble and run rough but not bad enough to make it undriveable but its just not right. Has anyone else run in to this and what do I need to check next? Thanks for any help Warren
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JoeZ
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Joined: Dec 2008

Note Friday July 20, 2012 05:35 View thread in raw text format
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Two things that come to mind.....cam sensor or jake brake. It could be an ECM problem, wiring or any number of things...but check those things first.

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One of the last 2 Stroke mechanics left.
44 years in the business and worked on everything from 53 series to 149 series. Winding it down now...time to move on.
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Skidd88
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Joined: Feb 2014

Note Saturday February 15, 2014 15:56 View thread in raw text format
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Hey, I have run into this problem also, there were several things that I did and it made a difference. Cleaned the block grounds and battery connections, then sent the ecm to Mid-West ECM repairs. They refurbish ecm's for n-14's and others, give them a try.

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Master ASE Tech, International Dealership Certified, Cummins, Detroit, Freightliner Dealership Trained.
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