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

98 12 valve low power?

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  #21  
Old 09-24-2014, 10:02 AM
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Yup .. Low FP .. mine is 28-30 @ Idle .. goes lower when I'm standing on it ... 20-24PSI @ WOT ..
 
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  #22  
Old 09-24-2014, 06:33 PM
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Yes i replaced fuel filter and filter screen about a month ago.. also i have a ofv valve with shims in it to run higher pressure so yea i would say its time for lift pump
 
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  #23  
Old 09-24-2014, 06:43 PM
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or maybe air getting in the lines somewhere.
 
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  #24  
Old 09-24-2014, 08:56 PM
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Yea ill have to bring home a test hose from work and test for air in the fuel
 
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  #25  
Old 09-25-2014, 10:40 AM
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Originally Posted by countryboy040993
Yes i replaced fuel filter and filter screen about a month ago.. also i have a ofv valve with shims in it to run higher pressure so yea i would say its time for lift pump
Yeah, I would say dont spend anymore time spending money on parts till your LP is replaced or until you can verify the flow/PSI
 
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  #26  
Old 09-25-2014, 05:57 PM
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Ok well i can get the lift pump for 54 dollars from work and i already have gaskets so im buyin it at work tonight and puttin it on this weekend hopefully
 
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  #27  
Old 09-26-2014, 11:12 AM
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Make sure its a QUALITY re-build .. other wise your gonna be back there real soon !!!
 
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  #28  
Old 09-26-2014, 05:04 PM
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Ok so went to install new lift pump and i guess it wasnt seated straight and broke the rod off... my question is where did it go and how to get it out...
 
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  #29  
Old 09-26-2014, 06:07 PM
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****.
 
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  #30  
Old 09-26-2014, 06:16 PM
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Yea... not a happy camper.. i guess tomorrow ill get a magnet and maybe fish it out.. or ill pull the drain plug on my oil pan and jack the truck up to it rolls back and pull it out through there.. hopefully....
 
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