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

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Old Sep 19, 2010 | 08:38 PM
  #1  
wisconsin redneck's Avatar
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sooo this is kinda starting to **** me off. i have been trying to fix this for a month or 2... when my truck sits for 4 hours or more, it pops, and smokes white like crazy and runs rough for a minute, then after that it runs fine. i have replaced the ofv, every single inch of fuel line (pressure and return) in the truck. the injectors seem to be leaking a little bit, not much tho. thats next on my list. would that be the problem?
 
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Old Sep 20, 2010 | 11:45 AM
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id bet its the injectors leaking into the cylinder when you let it sit.
 
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Old Sep 20, 2010 | 02:46 PM
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Dallas Flywheels's Avatar
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Fuel leaking back,and or sucking air some place.
 
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Old Sep 20, 2010 | 04:11 PM
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Originally Posted by goalie990
id bet its the injectors leaking into the cylinder when you let it sit.
x2
 
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Old Sep 20, 2010 | 04:49 PM
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Originally Posted by Bubba88
x2
sounds logical
 
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Old Sep 20, 2010 | 04:51 PM
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Sounds like injectors loosing pressure
 
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Old Sep 20, 2010 | 06:53 PM
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wisconsin redneck's Avatar
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ok sooo im gonna go with injectors... my mechanic that used to work on my truck said he pop-tested them... which was about 4 months ago. but he also said he fixed my fuel leak... which wasnt true, so to fix this injector problem.... what has to be done?
new injectors? seals?
 
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Old Sep 20, 2010 | 10:58 PM
  #8  
lodal cummins's Avatar
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pull the injectors and take a mini shop vac with small hose and suck everything out of the injector holes. that will make sure there is nothing in between the copper washers. that is what i did and there was a bit of crap in the holes. no leaks at all. just my 2 cents!
 
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Old Sep 21, 2010 | 11:52 AM
  #9  
wisconsin redneck's Avatar
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well i just ordered a set of sdx's last night, just 5X.10s so nothin to big cant wait for them to get here!!!
 
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Old Sep 27, 2010 | 12:04 PM
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those are great injectors....im gettin a set of 5x.16 when i get the twins
 
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