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

loosing power while towing

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Old Feb 1, 2011 | 10:12 AM
  #31  
noizykrikit's Avatar
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replaced the lift pump thought that took care of the problem got in it yesterday pulled it out of shop multiple times no issues out of the 2 dozen times i put it in park let it idle and then put back into drive it bogged out and died once i lost here anyone have any suggestions or have had the same problem the idle in gear is around 900-1000 rpm as far as i know the engine is all stock
 
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Old Feb 1, 2011 | 12:32 PM
  #32  
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I've heard of people getting bad lifts pumps that have similar problems. I think your best bet is to find out what your fuel pressure is at.
 
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Old Feb 3, 2011 | 03:38 PM
  #33  
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Install a f/p gauge. Its cheap, easy and will provide a lifetime of information regarding fueling issues.
 
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Old Feb 13, 2011 | 04:06 PM
  #34  
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did you check the screen inside the fuel bowl on the lift pump yet. they are bad about clogging up.
 
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Old Feb 13, 2011 | 08:03 PM
  #35  
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not yet but im planning on workin on it this week and gonna check on that while im putting a new overflow valve and fuel pressure guage
 
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Old Feb 16, 2011 | 05:21 PM
  #36  
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i installed fuel pressure guage and put in a new overflow valve as well truck is gettin between 25-28 psi in park truck idles around 1,000-1200rpm truck still boggs outand dies randomly when put into drive and you try to take off sometimes it does it sometimes it dont i havent checked the fuel heater bowl yet and havent done anything with the fuel tank anyone got any ideas

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took the fuel heater bowl off to cleanthe screen off it had sludge like substance in around the base of the screen and along the sides can someone let me know if thats the fuel gelling or something else and do i need to replace any lines i know im gonna have to drop the fuel tank and check the sending unit in the tank and see what might be in it
 

Last edited by noizykrikit; Feb 16, 2011 at 05:21 PM. Reason: Automerged Doublepost
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Old Mar 13, 2011 | 07:08 PM
  #37  
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ok heres the update replaced fuel filter replaced lift pump cleaned screen in fuel heater bowl replaced screen on the bottom of sending unit drained and cleaned the inside of the tank also strained the diesel before putting it back in getting almost 30psi on the fuel pressure guage but still stalls after shifting from park to drive but doesnt do it everytime i did not however replace sending unit because it does run and drive 95% of the time i start it but now after i put it all back together my fuel guage isnt working and the fuel light stays on any help would be great
 
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