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

FUEL MILAGE?????

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  #21  
Old 03-30-2009, 07:19 AM
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ALRIGHT SOMEBODYS GONNA HAVE TO TELL ME WHATS GOING ON.IVE BEEN BABYING THE HELL OUY OF MY TRUCK THIS LAST TANK FULL.NO BLACK SMOKE AND STILL 13MPG.THATS CRAZY WHEN EVERYBODY ELSE WITH MY SETUP IS GETTIN 18-20.
 
  #22  
Old 03-30-2009, 11:28 AM
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check air filter lately?
 
  #23  
Old 03-30-2009, 12:20 PM
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IT'S A K&N IT LOOKS GOOD FROM THE OUTSIDE,MAYBE I SHOULD LOOK CLOSER,ANY OTHER IDEAS?
 
  #24  
Old 03-30-2009, 10:14 PM
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I would change the filter, Do you have an aftermarket intake? most people just run the "BHAF" that could be why they get better mpg, also your timming and injectors could have influence on mpg. I would run some cetain boost. i like the one in the grey bottle. BTW-My tuck says it has 3:50 gear ratio on the tag under the hood. I thought they only offered 3:23, 3:54, 3:73,4:10,4"56? Is that a misprint?
 

Last edited by 392hemix; 03-30-2009 at 10:20 PM.
  #25  
Old 03-31-2009, 07:25 AM
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RUN WHAT KIND OF BOOST?
 
  #26  
Old 03-31-2009, 08:45 AM
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cetane booster. cetane is to diesel what octane is to gas
 
  #27  
Old 03-31-2009, 09:02 AM
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CAN YOU TELL A DIFFERENCE,AND WHERE DO YOU GET IT?
 
  #28  
Old 03-31-2009, 12:09 PM
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with out the wastegate it may not get as good mileage either
 
  #29  
Old 03-31-2009, 12:41 PM
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HOW WOULD IT NOT HAVING THE WASTEGATE AFFECT IT?NOT ARGUING,JUST WONDERING.
 
  #30  
Old 03-31-2009, 01:20 PM
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You can get it at the parts house around here. I'm not sure if you'll be able to tell the difference or not, but then again the stuff doesn't cost all that much...it may be worth a couple bucks to you to find out what it does for your particular set-up .
 
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