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PLEASE HELP!

Discussion in 'Volvo Forum' started by rhitrucking, Mar 28, 2019.

Page 2 of 14
  1. Mar 28, 2019 #11
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    romulus,mi
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    I'm going to bet dpf failure. Have not had a lot of luck with professional cleaning. Pin test is best way to check before re-installing. Listen to Nasriza. He will get straightened out for you.
     
    QUALITYTRUCK, Mar 28, 2019
    QUALITYTRUCK, Mar 28, 2019
    #11
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  3. Mar 29, 2019 #12
    rhitrucking

    rhitrucking Light Load Member

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    Feb 7, 2017
    0
    havent got the DPF filter out yet or tested backpressure without scr connected, but here is what my sheet says from cleaning company.

    DOC vacuum diff before: 1.6
    DOC Vacuum diff after: 0.7
    DOC Soot Volume before:17358
    DOC Soot Volume after:17303
    DPF vacuum pressure diff before: 2.8
    DPF vacuum pressure diff after: 1.1
    DPF soot volume before:18716
    DPF soot volume after:18606

    Are these within volvo spec?
     
    rhitrucking, Mar 29, 2019
    rhitrucking, Mar 29, 2019
    #12
  4. Mar 29, 2019 #13
    rhitrucking

    rhitrucking Light Load Member

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    We ruled out the SCR. disconnected it at the bellow between dpf and scr and did a backpressure test. basically the same, went from 1.3/1.4 to 1.2 with bellow disconnected. Is there anything else in the DPF can that can cause a restriction besides DOC and filter?
     
    Last edited: Mar 29, 2019
    rhitrucking, Mar 29, 2019
    rhitrucking, Mar 29, 2019
    #13
  5. Mar 29, 2019 #14
    Johny41

    Johny41 Road Train Member

    1,192
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    Feb 10, 2011
    Ontario, Canada
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    Rhitrucking, I remember someone posted a similar photo here, the flex pipe inner heat shiled layer detached fried, blocking the exhaust flow. But never happened to me, this pipes usually develop cracks leak smoke and need replaced before this kind of issues. I don't think this would signal high dpf differential presure readings.
    [​IMG]
     
    Johny41, Mar 29, 2019
    Johny41, Mar 29, 2019
    #14
  7. Mar 29, 2019 #15
    rhitrucking

    rhitrucking Light Load Member

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    Feb 7, 2017
    0
    my pipe was still in decent shape, however, I couldnt get all the crystalized DEF out of it. It was like a rock stuck in there. Ended up buying a new bellows tube,gaskets and clamps. I appreciate all the input, we did a wire test on the filter, no restrictions at all. It looks brand new still, well as new as can be just being cleaned 75 miles ago, but, soot level says 70%. I wish it was something as simple as the dpf diff pressure sensor, but the sensor is reading correct. Its reading a back pressure from somewhere..where...who knows!
     
    rhitrucking, Mar 29, 2019
    rhitrucking, Mar 29, 2019
    #15
  8. Mar 29, 2019 #16
    Snailexpress

    Snailexpress Road Train Member

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    Rocky
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    Do you know the DPF filter soot level should be reset after cleaning
     
    Snailexpress, Mar 29, 2019
    Snailexpress, Mar 29, 2019
    #16
  9. Mar 29, 2019 #18
    rhitrucking

    rhitrucking Light Load Member

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    Feb 7, 2017
    0
    Yes. It was done.
     
    rhitrucking, Mar 29, 2019
    rhitrucking, Mar 29, 2019
    #18
  10. Mar 29, 2019 #18
    nasriza

    nasriza Road Train Member

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    Feb 1, 2013
    Chicago, IL
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    The numbers befor and after cleaning do not make sense to be even though vacuum or flow looks good soot volume should be much lower. Test dpf and doc for collapsing inside almost certain This is you broblem also check flex behind turbo. Even though it should not exactly cause symptoms your are having
     
    nasriza, Mar 29, 2019
    nasriza, Mar 29, 2019
    #18
    Rob100100 Thanks this.
  11. Mar 29, 2019 #19
    rhitrucking

    rhitrucking Light Load Member

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    Feb 7, 2017
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    If Nasriza is saying my filter is the problem, then I am getting a new filter. I cant question his knowledge.
     
    rhitrucking, Mar 29, 2019
    rhitrucking, Mar 29, 2019
    #19
  12. Mar 29, 2019 #20
    nasriza

    nasriza Road Train Member

    2,397
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    Feb 1, 2013
    Chicago, IL
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    I’m saying we have to find the problem I cost a lot of people $$$$ getting to know what I know now I wouldn’t change filter just yet. Did u drop them out how they look back and front and all
     
    nasriza, Mar 29, 2019
    nasriza, Mar 29, 2019
    #20
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