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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truck running weak please help!

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Old Feb 17, 2011 | 08:29 AM
  #11  
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if that is post turbo temps then this is very weird

yer not getting the fuel for some reason
 
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Old Feb 17, 2011 | 08:37 AM
  #12  
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That is what i was thinking. This thing has been driving me nuts.

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Lift pump is running great to. I called chip at blue chip and he said to run a clear line loop to look for air bubbles so i did and not a thing smooth as could be.
 

Last edited by trevor_110; Feb 17, 2011 at 08:37 AM. Reason: Automerged Doublepost
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Old Feb 17, 2011 | 08:43 AM
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have you checked the MAP sensor
 
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Old Feb 17, 2011 | 08:47 AM
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get an infered temp gun and with a cold motor start it up then scan all 6 exhaust ports at the manifold and monitor for a cold one.................this is tricks because of heat transfer thru conduction, I have acuratly told guys of dead injectors this way on the six point Oh no fords
 
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Old Feb 17, 2011 | 08:47 AM
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Yeah replaced it and put a new plug on the end as the old wires looked a little ruff at the connection. The cam sensor is the only one that i have yet to replace in this process.
 
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Old Feb 17, 2011 | 08:50 AM
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the cam sensor is fine.............they eithr work or not, if it isnt then the truck wont run at all
 
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Old Feb 17, 2011 | 08:53 AM
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I will give it a try, but wouldnt it idle ruff or something if injectors were the cause or can they kinda hide sometimes?
 
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Old Feb 17, 2011 | 09:20 AM
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I wonner if that check valve on the VP is spilling back to the tank....................they are cheap I would replace it
 
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Old Feb 17, 2011 | 12:57 PM
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this might be a dumb question, but have you changed the fuel filter recently? also take it down to the dealership and have them run a cylinder cut out test to see if you can hear a difference between cylinders. could lead you to the trouble hole.
 
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Old Feb 17, 2011 | 07:28 PM
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Yeah filter was changed about a month ago.

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Originally Posted by Whit
I wonner if that check valve on the VP is spilling back to the tank....................they are cheap I would replace it
By the check valve do you mean that press reg on the the side of the vp. Its a banjo style? Or is there another one?
 

Last edited by trevor_110; Feb 17, 2011 at 07:28 PM. Reason: Automerged Doublepost
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