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

"Chugging" question

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  #11  
Old 06-04-2012, 03:30 PM
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Originally Posted by coreywarren
Yeah Ive taken that off cleane te screen wasn't very dirty. And I also replaced the rubber elbow that goes from the lift pump to the heater. That was cracked and leaking pretty good.
I think I'm gonna take the fuel heater right out, I've Hurd that your better off without it
I removed mine with no complaints. That heater really is worthless LOL.
 
  #12  
Old 06-04-2012, 05:06 PM
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I feel like its an injector too. Is there a number stamped on it or some way to identify make and size?
 
  #13  
Old 06-04-2012, 05:31 PM
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Do you know what your running for
Fuel pressure?
 
  #14  
Old 06-04-2012, 07:32 PM
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I have no clue. Why?
 
  #15  
Old 06-04-2012, 07:36 PM
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No we didn't he had a set off of a 96 but u can clean them yourself its easy
 
  #16  
Old 06-04-2012, 08:35 PM
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Because knowing the fuel pressure Could tell you alot. Low pressure meaning
You have a faulty lift pump or overflow valve. Have good pressure could lead you somewheres else such as bad injectors etc.
 
  #17  
Old 06-04-2012, 10:14 PM
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But if i had bad fuel pressure why would the other injectors cause a drop in rpm when lines are cracked? The chugging clears up when the turbo starts spooling too.
 
  #18  
Old 06-06-2012, 10:42 AM
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I'm still thinking it's an injector.
 
  #19  
Old 06-07-2012, 05:54 PM
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So I got home from NC for work to my tow mirrors, which one was broken so it had to go back, but here is the other..


I also pulled out the first injector, took it apart and cleaned it real good. There was quite a bit of carbon on the nozzle. The problem is not fixed, but im going to take the rest out to clean tomorrow and check the fuel pre heater screen to see if it is gummed up. Hopefully it is..

 
  #20  
Old 06-07-2012, 07:16 PM
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do you remember how many holes were in the tip? that could designate who "made" the injectors....
 


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