Engine not workign good when parking brakes are on VOLVO 780 D13

Discussion in 'Volvo Forum' started by Pawel-pl, Feb 25, 2020.

  1. Pawel-pl

    Pawel-pl Bobtail Member

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    Hello,

    I noticed that when on parking with brakes on my truck is not working as good as when with brakes off. With parking brakes on the RPMS are shaking little bid and the engine is working much harder and louder. As soon as I turn off the parking brakes all is good and back to normal. There are no codes on the engine

    Did you anyone had a similar issue or maybe any idea what could be the cause?

    Volvo vnl 780 D13 with Ishift
     
  2. Scooter Jones

    Scooter Jones Road Train Member

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    What happens when you you bump the throttle up on CC switch?
     
  3. Pawel-pl

    Pawel-pl Bobtail Member

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    Jul 3, 2017
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    Same thing, RPMS shaking little bid and engine is working harder. The only thing that is changing it that I found is the parking brake when it's on the whole thing happens, when off engine works great.
     
  4. Deere hunter

    Deere hunter Heavy Load Member

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    I can’t be reading this right you’re trying to drive it with the parking brakes on?????
     
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  5. Pawel-pl

    Pawel-pl Bobtail Member

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    When on parking with brakes turned on there is the issue, when on parking with no breaks turned on there is no issue, when driving all is good, no codes at all
     
  6. Dave1837

    Dave1837 Light Load Member

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    Wow lol I can't be reading this right
     
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  7. Cattleman84

    Cattleman84 Road Train Member

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    Sounds like it has been left in gear... Did you move the shifter to neutral before setting brakes???
     
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  8. Pawel-pl

    Pawel-pl Bobtail Member

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    Yes I did
     
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  9. beastr123

    beastr123 Road Train Member

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    Sounds like the engine is trying to get ready to REGEN the dpf.
    It needs to get the engine temp up to do the REGEN and will change the timing to make the engine work and generate more heat.
     
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  10. x1Heavy

    x1Heavy Road Train Member

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    I am having trouble with this.

    I can also have alot of fun with this. But I'll just leave it alone today.
     
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