Engine loosing power, shaking at idle D13

Discussion in 'Volvo Forum' started by Pawel-pl, Sep 9, 2019.

  1. Pawel-pl

    Pawel-pl Bobtail Member

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    Jul 3, 2017
    0
    Hello,

    I have 2015 780 vnl, in the past year we had lots of things done to the truck yet we cant fogure out why it is loosing power and shaking at idle after hwy driving, never on cold start.

    So power loosing happens only sometimes on hwy.

    In past year we replaced:
    Injectors
    valves and cups,
    dpf filer
    dpf pump
    nox sensors and bunch of others arroundengine
    had reset on all learned scr data
    turbo and vgt
    change seals on exhaust pipes and cleared from all soot etc.
    7th injector
    checked for any cable issues and couldn't find any

    Do you guys have any idea for what is happening to the truck, no codes in the truck, The only one thing I noticed is that turbo is at 0 on idle and its not turning on as it used to be before change.


    Thanks in advance for any help.
     
  2. x1Heavy

    x1Heavy Road Train Member

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    White County, Arkansas
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    Junk it, get a newer truck.
     
    Bean Jr. Thanks this.
  3. Pawel-pl

    Pawel-pl Bobtail Member

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    Jul 3, 2017
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  4. uncleal13

    uncleal13 Road Train Member

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    Humboldt, Sk
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    Bad ECM? Seems fine when cold, problems occur after it gets hot. Electronic components can do that.
     
    Bean Jr. Thanks this.
  5. Pawel-pl

    Pawel-pl Bobtail Member

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    Do you know if there is any way to check it?
     
  6. uncleal13

    uncleal13 Road Train Member

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    Some dealers have a spare they’ll swap in for testing purposes.
    There is also a spray can we used in electronics, it sprays a really cold non conducting aerosol onto components to see if you get a operational change while the unit is operating. I don’t know with the large heat sinks a ECM has if this would be able to cool it enough. But cheap enough to try a couple of cans. Could spray it on all the other sensors too.
    403A - Super Cold 134 - Cold Spray | MG Chemicals
     
  7. Johny41

    Johny41 Heavy Load Member

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    Feb 10, 2011
    Ontario, Canada
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    Could be the egr valve acting, how old is it? with the engine hot, expanded materials in valve or springs, after driving maybe doesn't close properly allowing to much flow back at low rpm mesing the combustion. Venturi tube could be clogged or bad dif pressure sensor on venturi controlling the egr bad allows too much egr flow, but this usually throw codes. The most difficult to diagnose problem i had with D13, without throwing codes as you describe was egr valve stuck partially open, it's recommended to run the motor few min after stopping the truck allowing the egr to cool down.
    Just a thought , don't take me serious wasting $$.
     
    Last edited: Sep 9, 2019
    QUALITYTRUCK Thanks this.
  8. Pawel-pl

    Pawel-pl Bobtail Member

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    Both options sound possible to me, for sure will check them, the egr sounds possible and I was thinking about it. For sure will check both ECM and EGR. Thanks for help.
     
  9. Ridgeline

    Ridgeline Road Train Member

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    Go to a dealer, pay for the time for a mechanic to do a ride along with their computer and have the ecm data recorded. This is how they find the problem.
     
    uncleal13 Thanks this.
  10. Newto Trucking

    Newto Trucking Light Load Member

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    Dec 26, 2013
    NE Illinois
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    Whoever gonna connect Volvo software to your truck next time make sure they do this 2 tests and do compression couple times one after another because on a second or third attempt some cylinders may drop significantly
     

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