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Ok gents new problem time


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Ok sorting out all the bugs, and this one popped up. Havent been running the AC much lately (today was ...


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Old 05-01-2012, 09:04 PM   #1 (permalink)
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Ram Year: 1998
Engine: 98 CTD 12 Valve- Half the valves, twice the fun
Angry Ok gents new problem time
Ok sorting out all the bugs, and this one popped up.
Havent been running the AC much lately (today was the first time Ive really needed it, 88 with 86% humidity), and I noticed it idles rough as crap, almost lopes with the AC turned on. The truck actually stalled out in reverse as I was idling into a parking space tonight. This really bugs the crap out of me, a cummins stalling at idle???? WTF???? I can sit at a red light and hear the truck loping (or what I would call loping, kind of like an old big block with a stick cam at idle) watching the tach Im seeing it go up and down in small increments, but you can def hear it.

Oh and it does the same thing first thing in the mornings when I go to start it, doesnt matter if the truck is hot or cold. If I havent ran it in a couple hours does the same thing, idles rough as heck then smooths out, with AC it doesnt smooth out at all.
Is my idle set to low???


EDIT- Any of you fellow smoke blowers bless me with your god like knowledge of the beast thou art cummins.


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98 2500 12V- Cause if it requires a spark to run, its not worth it!

Last edited by Viper21700; 05-01-2012 at 09:52 PM.
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Old 05-01-2012, 10:48 PM   #2 (permalink)
 
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Is this just a recent occurrence? And it's only when the AC is on from what I understand right?

Honestly, I have no idea because of the AC thing, because I had something similar a while back happen and I found it to be just some bad fuel, so I double loaded it with Diesel Kleen and changed the fuel filter when the tank was empty again.


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Old 05-02-2012, 09:10 AM   #3 (permalink)
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Ram Year: 1998
Engine: 98 CTD 12 Valve- Half the valves, twice the fun
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PROBLEM SOLVED! My low idle set screw on the back of the pump was almost bottomed out. Should have realized the problem earlier, as my idle was barely over 600 rpm. adjusted it today to where she sounds right, shes a bit high right now, but Ill fine tune it in later this week lol. The procedure is located here
Ram Diesel Problems

Special thanks to the sticky over at the cummins forum, sorry, but as this was found off of their site I felt it necessary to give credit where credit is due. thanks for the info USMC1188, it didnt help this time, but knowledge might come in handy in the future.


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Old 05-02-2012, 09:26 AM   #4 (permalink)
 
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Glad to hear you solved it!


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