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Cummins isx continues to run after key off

Discussion in 'Trucks [ Eighteen Wheelers ]' started by JustinofPeteNYC, Apr 25, 2013.

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  1. Apr 25, 2013 #1
    JustinofPeteNYC

    JustinofPeteNYC Bobtail Member

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    Feb 26, 2013
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    Shut the key off and the engine will stumble for maybe 10 seconds. Anyone come across this? I narrowed it down to injectors 1,2 and 3. I disconnected the fuel control valve for them and ran the truck and shut it off and it shut right down. Anyone have much experience with this? Almost positive it's the 3 injectors but just looking for some input.
     
    JustinofPeteNYC, Apr 25, 2013
    JustinofPeteNYC, Apr 25, 2013
    #1
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  3. Apr 25, 2013 #2
    nasriza

    nasriza Road Train Member

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    Chicago, IL
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    It's the fuel shut off solenoid in the middle of the rail take apart clean the spring and disks inside the house change o rings and put back it will shut off right away I've ran across this maybe 30 times its always same thing
     
    nasriza, Apr 25, 2013
    nasriza, Apr 25, 2013
    #2
  4. Apr 25, 2013 #3
    JustinofPeteNYC

    JustinofPeteNYC Bobtail Member

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    Feb 26, 2013
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    Customer already changed the shut off valve. That was my first idea but then found out it was changed
     
    JustinofPeteNYC, Apr 25, 2013
    JustinofPeteNYC, Apr 25, 2013
    #3
  5. Apr 25, 2013 #4
    nasriza

    nasriza Road Train Member

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    He changed the solenoid or the actuall valves inside.
     
    nasriza, Apr 25, 2013
    nasriza, Apr 25, 2013
    #4
  7. Apr 25, 2013 #5
    JustinofPeteNYC

    JustinofPeteNYC Bobtail Member

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    Feb 26, 2013
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    Everything
     
    JustinofPeteNYC, Apr 25, 2013
    JustinofPeteNYC, Apr 25, 2013
    #5
  8. Apr 25, 2013 #6
    nasriza

    nasriza Road Train Member

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    Did you check if the power is shutting off to the solenoid when you turn the key off or if the truck shuts down if you remove the power wire.
     
    nasriza, Apr 25, 2013
    nasriza, Apr 25, 2013
    #6
  9. Apr 25, 2013 #7
    JustinofPeteNYC

    JustinofPeteNYC Bobtail Member

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    Feb 26, 2013
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    I did check for power after key off to shut off valve and there was none but I should disconnect it while running and see what happens. Still think I got an injector or two leaking down into the cylinder
     
    JustinofPeteNYC, Apr 25, 2013
    JustinofPeteNYC, Apr 25, 2013
    #7
  10. Apr 25, 2013 #8
    nasriza

    nasriza Road Train Member

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    Chicago, IL
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    Remove power and it should shut off right as you remove it
     
    nasriza, Apr 25, 2013
    nasriza, Apr 25, 2013
    #8
  11. Apr 26, 2013 #9
    truckmechanic

    truckmechanic Medium Load Member

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    Jan 14, 2012
    Hi Desert Ca
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    [HR][/HR]Can be the timing or fuel actuatators there are four of them the shut off selinoid is in the middle two front are fuel and timing for the front 3 cyl the rear 2 are fuel and timing for the back 3 cyl also check the internal parts of the fuel selnoid for burs and debris also make sure the mounting screws have a good connection as thats how it has its ground
     
    truckmechanic, Apr 26, 2013
    truckmechanic, Apr 26, 2013
    #9
  12. Apr 26, 2013 #10
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    romulus,mi
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    the customer changing the solenoid himself may be the problem.as all of us "professionals"know it is very easy to put the solenoid parts back together wrong.triple check.good luck.
     
    QUALITYTRUCK, Apr 26, 2013
    QUALITYTRUCK, Apr 26, 2013
    #10
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