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Help! Cummins N14 knocks at idle but not under Insite cut out test

Discussion in 'Trucks [ Eighteen Wheelers ]' started by bravoo67, Feb 19, 2019.

Page 2 of 2
  1. Feb 20, 2019 #11
    bravoo67

    bravoo67 Light Load Member

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    Mar 15, 2012
    Brooklyn NY
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    Have all new pass thru, gotta check new ECM when it arrives
     
    bravoo67, Feb 20, 2019
    bravoo67, Feb 20, 2019
    #11
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  3. Feb 26, 2019 #12
    bravoo67

    bravoo67 Light Load Member

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    Mar 15, 2012
    Brooklyn NY
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    SOLVED! new ECM didnt help, truck was still knocking at idle, previous owner bypassed ECM cooler plate, fuel check valve was plugged, changed it and reconnected fuel lines to the plate, engine runs smooth since
     
    bravoo67, Feb 26, 2019
    bravoo67, Feb 26, 2019
    #12
    DUNE-T, MagnumaMoose, tommymonza and 3 others Thank this.
  4. Feb 27, 2019 #13
    rank

    rank Road Train Member

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    Feb 11, 2010
    50 miles north of Rochester, NY
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    Glad to hear. For future Reference I’m pretty sure there’s a way to use Insite to show the fuel flow on each injector
     
    rank, Feb 27, 2019
    rank, Feb 27, 2019
    #13
    MagnumaMoose Thanks this.
  5. Feb 27, 2019 #14
    tommymonza

    tommymonza Road Train Member

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    S.W. Florida
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    My new to me 97 international has a small knock on the rear cylinder I have yet to investigate. Any pics of cooler plate?
     
    tommymonza, Feb 27, 2019
    tommymonza, Feb 27, 2019
    #14
  7. Feb 27, 2019 #15
    tommymonza

    tommymonza Road Train Member

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    Never mind. Got it
     
    tommymonza, Feb 27, 2019
    tommymonza, Feb 27, 2019
    #15
  8. Mar 1, 2019 #16
    bravoo67

    bravoo67 Light Load Member

    252
    35
    Mar 15, 2012
    Brooklyn NY
    0
    Just bought cooler plate on ebay, found it for $50, N14 cooler plates look same like M11 but differ with location of mounting screw holes,
    Cummins N14 part # for ECM cooler plate is 3062625
    Usually they are not a problem but a fuel check valve that mounts on them plugs with debris and truck can lack power or misfire
     
    bravoo67, Mar 1, 2019
    bravoo67, Mar 1, 2019
    #16
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