24 Valve 2nd Gen Dodge Cummins 98.5-02 Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps
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fuel pressure question

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  #21  
Old 02-18-2012, 04:41 PM
vineyardm's Avatar
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Take a look at the picture at this link:

VULCAN PERFORMANCE - FILTER TO INJ PUMP HOSE KIT ('98.5-'07)-Dodge Cummins Diesel Truck Accessories – Geno’s Garage

The right hand side fitting shows a 1/8" x 1/8" fitting - remove it, put in the grease pump flex line - put the fuel pressure sensor at the other end of the flex line.

Yes - your line to IP comes off the bottom of the fuel filter - and it is another of those dreaded banjo fittings!!

Glacier Diesel Power has slightly lower prices - but I did not see them having the tapped fitting that lets you get the fuel pressure sensor right at the IP connection. If they have one - great, buy on best price. But don't buy lower price if it isn't optimum!!
 

Last edited by vineyardm; 02-18-2012 at 04:45 PM. Reason: add more info
  #22  
Old 02-19-2012, 08:18 AM
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That kit really looks like a good idea I think I'm gonna order one today. but in the picture it looks like you have to assemble the hose?
 
  #23  
Old 02-19-2012, 04:35 PM
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Yes ...you get the pieces and assemble - but it is trivially easy (I did it for both of my 2002 trucks!!) Well worth the effort. ...and it will improve the pressure at the IP over the existing system!
 
  #24  
Old 02-19-2012, 05:07 PM
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Ordered one just a few hours ago now I just wait haha I hate this part.
 
  #25  
Old 02-19-2012, 08:02 PM
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Yeah your right, I've got the GDP kit and it doesn't have a boss direct into the pump fitting, it uses a push-fit boss which the sensor goes into immediately before the VP inlet.

Good news, free up your post filter flow nicely


Banks Monster Ram inlet-BHAF-Pensecola 50hp injectors-Raptor 150 lift pump-GDP Big lines-Banks heater delete-Smarty-BD low pressure light........for now
 
  #26  
Old 02-20-2012, 05:25 PM
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Well I pulled the bed off Sunday to check the strainer in the tank to find nothing wrong there. so when I get my line for the Ff to ip hopefully that will free up some pressure if not I may have to send this raptor in for a warranty. o and for amyone that tries pulling these beds off with 2 people it really sucks but can be done that suckers heavy.
 
  #27  
Old 02-20-2012, 05:38 PM
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Let me know what you find!! I have mine set at 40 psi and I see 30 sometimes WOT!
 
  #28  
Old 02-20-2012, 05:51 PM
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40????? Life at that pressure is questionable for a vp. With a captor I would check restriction pre pump, a bucket test and check pressure pre and post filter.

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  #29  
Old 02-20-2012, 06:46 PM
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I don't understand??? I know lots of guys running 50psi. I have had it set there at 40 for 4 months. IS 40 TO HIGH!!!

---AutoMerged DoublePost---

maybe that's why I only get 17mpg at 55 and get 20mpg at 85.
 

Last edited by Smittyloopster; 02-20-2012 at 06:46 PM. Reason: Automerged Doublepost
  #30  
Old 02-20-2012, 06:57 PM
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40 will cause the diaphragm to leak and causing the pump to fail. That's been known for years . The pump will make as much power as it can and live for years at 15lbs. 40 is just harder on the lift pump and the injection pump

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