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Whats normal fuel restiction sposed to read onthe guage?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by JakeBrakeChampion, Mar 26, 2012.

  1. Mar 26, 2012 #1
    JakeBrakeChampion

    JakeBrakeChampion Light Load Member

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    Apr 14, 2011
    Pennsylvania
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    I have noticed on my n14 celect that when idleling and under light to hard throttle the restriction guage reads what i belive to be normal half way in the white part of the guage but as soon as you let off to shift or coast or jake brake the neelde flies up into the red than as soon as you give it any sort of fuel it levels out... Is this any indication of anything wrong?
     
    JakeBrakeChampion, Mar 26, 2012
    JakeBrakeChampion, Mar 26, 2012
    #1
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  3. Mar 27, 2012 #2
    Heavyd

    Heavyd Road Train Member

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    Feb 4, 2009
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    What kind of truck? Is this a factory gauge or aftermarket? Any numbers or scale on this gauge? Can you post a picture? Does the engine run ok? Your info is just too vague. Max allowable fuel inlet restriction is usually around 6-8 inches of Hg.
     
    Heavyd, Mar 27, 2012
    Heavyd, Mar 27, 2012
    #2
  4. Mar 27, 2012 #3
    Nevs

    Nevs Light Load Member

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    Dec 25, 2010
    flyover country (Iowa)
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    My MXS Cat has 5# with new filters...
     
    Nevs, Mar 27, 2012
    Nevs, Mar 27, 2012
    #3
  5. Mar 28, 2012 #4
    Heavyd

    Heavyd Road Train Member

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    1 PSI = 2 inches of Mercury, so you have about 10 inches of restriction showing on your gauge! I don't have access to Cat, but International and Cummins the highest allowable restriction with a new filter is 8".
     
    Heavyd, Mar 28, 2012
    Heavyd, Mar 28, 2012
    #4
  7. Mar 28, 2012 #5
    pup

    pup Light Load Member

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    Dec 3, 2011
    n.h.
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    The restriction guage rising when you coast or let off the throttle is normal. Nothing wrong. Fuel flow increases when the injectors are off.
     
    pup, Mar 28, 2012
    pup, Mar 28, 2012
    #5
    Heavyd Thanks this.
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