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Cummins ISX15 crankcase pressure

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by mitmaks, Mar 11, 2017.

Page 3 of 4
  1. Mar 17, 2017 #21
    mitmaks

    mitmaks Road Train Member

    2,544
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    May 16, 2014
    0
    When they did dyno they also had blowby done, heres chart that th3y gave me
     

    Attached Files:

    mitmaks, Mar 17, 2017
    mitmaks, Mar 17, 2017
    #21
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  3. Mar 17, 2017 #22
    mitmaks

    mitmaks Road Train Member

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    Looks like 4.7-4.8 in H2O
     
    mitmaks, Mar 17, 2017
    mitmaks, Mar 17, 2017
    #22
  4. Mar 17, 2017 #23
    dustinbrock

    dustinbrock Road Train Member

    1,308
    901
    Apr 19, 2012
    North Battleford, SK
    0
    Ok. You'll have to ask cummins if that's within spec for.your engine.

    Did you ever pull back and inspect the wiring going to the crankcase pressure sensor?
     
    dustinbrock, Mar 17, 2017
    dustinbrock, Mar 17, 2017
    #23
  5. Mar 17, 2017 #24
    mitmaks

    mitmaks Road Train Member

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    Yes, wiring looks good, Ive inspected it today as CEL was on. Pulled filter øff and there was a little bit of oil.
    currently CEL is off. It randomly goes on and off, today it stayed off until I was descending Veil pass. Stayed off while I was climbing mountains though
     
    mitmaks, Mar 17, 2017
    mitmaks, Mar 17, 2017
    #24
  7. Mar 17, 2017 #25
    dustinbrock

    dustinbrock Road Train Member

    1,308
    901
    Apr 19, 2012
    North Battleford, SK
    0
    There are no other codes? Dpf related? A plugged dpf can cause enough back pressure to increase blowby but your pyro (if you have one) will usually climb.
     
    dustinbrock, Mar 17, 2017
    dustinbrock, Mar 17, 2017
    #25
  8. Mar 17, 2017 #26
    mitmaks

    mitmaks Road Train Member

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    No other codes, dpf was baked/cleaned at cummins before i bought truck
     
    mitmaks, Mar 17, 2017
    mitmaks, Mar 17, 2017
    #26
  9. Mar 18, 2017 #27
    mitmaks

    mitmaks Road Train Member

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    I stopped at KW dealer that was able to work on the truck today in Salina, UT
    Sure enough, he replaced connectors going into sensor plug and I was on my way.
    They really didnt look bad but I guess he wiggled them hard enough to see the problem.
     
    mitmaks, Mar 18, 2017
    mitmaks, Mar 18, 2017
    #27
    dustinbrock Thanks this.
  10. Mar 18, 2017 #28
    dustinbrock

    dustinbrock Road Train Member

    1,308
    901
    Apr 19, 2012
    North Battleford, SK
    0
    Right on, good to hear it was a easy fix!
     
    dustinbrock, Mar 18, 2017
    dustinbrock, Mar 18, 2017
    #28
  11. May 22, 2018 #30
    thomnel53

    thomnel53 Bobtail Member

    5
    0
    Apr 26, 2016
    0



    Any more updates to this? I am having this problem on a 13 Pete. Replaced sensor and plug and has the maintenance free breather. Light came back on after 200 miles but goes away if I turn the truck off and back on.
     
    thomnel53, May 22, 2018
    thomnel53, May 22, 2018
    #30
  12. May 22, 2018 #30
    mitmaks

    mitmaks Road Train Member

    2,544
    2,065
    May 16, 2014
    0
    Did you replace entire wire pigtail or you've spliced into it?
     
    mitmaks, May 22, 2018
    mitmaks, May 22, 2018
    #30
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