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2002 cummins ISB shutting down

Discussion in 'Trucks [ Eighteen Wheelers ]' started by kgktm, Nov 15, 2011.

  1. Nov 15, 2011 #1
    kgktm

    kgktm Bobtail Member

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    Working on a 02 freightliner mt 45.Has a ISB that is randomly shutting down.At idle it surges sometimes.Changed lift pump,put inline filter before lift pump to check for debris.Pressure is 12PSI at vp.Changed cam sensor,Wired the 12 volt supply to vp pump directly still randomly shutting down but starts right back up.Truck could run fine half the day than start acting up.There are no codes being set.There is no smoke or miss.When it acts up it could sputter than clear up or just shuts off like you turned the key off.Ypu could be driving down the road and it would be running fine than just shuts off but starts right back up.
     
    kgktm, Nov 15, 2011
    kgktm, Nov 15, 2011
    #1
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  3. Nov 15, 2011 #2
    JohnP3

    JohnP3 Road Train Member

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    First off I Would clean the battery connections, the ground wires to the engine, and the cab. I would remove the extra keys, on the ignition switch. If that does not do it remove the ignition switch and check the wiring, and connections.
    Just a thought!
     
    JohnP3, Nov 15, 2011
    JohnP3, Nov 15, 2011
    #2
  4. Nov 15, 2011 #3
    kgktm

    kgktm Bobtail Member

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    cleaned the batteries,and all the grounds on frame.
     
    kgktm, Nov 15, 2011
    kgktm, Nov 15, 2011
    #3
  5. Nov 16, 2011 #4
    rollinsmoke10

    rollinsmoke10 Bobtail Member

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    john why do you say remove the extra keys?
     
    rollinsmoke10, Nov 16, 2011
    rollinsmoke10, Nov 16, 2011
    #4
  7. Nov 16, 2011 #5
    bender

    bender Road Train Member

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    The fuel shutoff solenoid is built into the VP44 pump and has been known to fail in the manner you describe.
     
    bender, Nov 16, 2011
    bender, Nov 16, 2011
    #5
  8. Nov 16, 2011 #6
    kgktm

    kgktm Bobtail Member

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    wouldn't it throw a code,
     
    kgktm, Nov 16, 2011
    kgktm, Nov 16, 2011
    #6
  9. Nov 16, 2011 #7
    bender

    bender Road Train Member

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    Nope, intermittent fuel shutoff solenoid triggers no code.
     
    bender, Nov 16, 2011
    bender, Nov 16, 2011
    #7
  10. Nov 17, 2011 #8
    kgktm

    kgktm Bobtail Member

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    vp pump needs to be replaced i guess
     
    kgktm, Nov 17, 2011
    kgktm, Nov 17, 2011
    #8
  11. Nov 17, 2011 #9
    bender

    bender Road Train Member

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    One time I had an 02 freightliner delivery van with an ISB doing the same thing, but the driver noticed the voltmeter would be pegged left when the engine shutdown while driving. The alternator was intermittently shorting to ground. You might slip the belt off and check for play and give it a spin and check for noise/roughness in the bearings.
     
    bender, Nov 17, 2011
    bender, Nov 17, 2011
    #9
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