12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

loping idle

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Old Sep 12, 2011 | 08:51 PM
  #1  
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Default loping idle

new injectors....i installed them....2 were leaking....fixed the one.....the other leaks a tiny tiny bit. when i fixed the one the truck seems to have a slight lope in park. when in gear it goes away. also when i give it a little gas it seems to miss till about 800rpm then it goes away. lift pump going? no white smoke at all so i doubt timing. could it be that tiny injector leak? injectors are 5x14's

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O lift pump been ticking for about a year now.

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OFV maybe?
 

Last edited by monster12valve; Sep 12, 2011 at 08:51 PM. Reason: Automerged Doublepost
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Old Sep 12, 2011 | 09:00 PM
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What RPM are you idling at?
 
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Old Sep 13, 2011 | 06:05 PM
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600 rpm in park
 
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Old Sep 13, 2011 | 06:14 PM
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Default loping idle

600 it a little low. I think it's should be around 800 with AC on...
 
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Old Sep 13, 2011 | 07:11 PM
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It's definitely low. I have my idle at 1000. Then in gear it drops to 750.
 
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Old Sep 13, 2011 | 07:24 PM
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Yeah, should be 750-800 in drive with the a/c on. I would bump it up and see if it improves.

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Old Sep 13, 2011 | 07:36 PM
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yup, 800 in gear with the A/C on is what mine was set at.
 
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Old Sep 14, 2011 | 06:31 PM
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I was having similar problems (even stalling when cold some times) and my idle was close to yours .. bumped to just shy of 1k park and just under 800 in gear and problems when a way .. i would do that first ... if problem is still there check timing ( can never hurt to be sure) and go from there
 
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Old Sep 16, 2011 | 01:09 PM
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cool. gonna check that next week. thanks for taking time to help
 
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Old Sep 16, 2011 | 04:35 PM
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Maybe the little gas U R given her is given her a belly ache.
 
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