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Delta pressure sensor moist water

Discussion in 'Ask An Owner Operator' started by crucar1800, Feb 13, 2020.

Page 2 of 2
  1. Mar 16, 2021 #11
    Oscar the KW

    Oscar the KW Going Tarpless

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    May 19, 2011
    0
    Replace it.
     
    Oscar the KW, Mar 16, 2021
    Oscar the KW, Mar 16, 2021
    #11
    Lockport Thanks this.
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  3. Mar 16, 2021 #12
    Johny41

    Johny41 Road Train Member

    1,192
    1,017
    Feb 10, 2011
    Ontario, Canada
    0
    I'm not familiar with Detroit, but i had same issue with my volvo D13 ( mostly in cold time of the year), moisture inside and throws egr flow codes, could also signal leaking egr cooler, because is located on venturi tube downstream from EGR cooler. But mostly because there's moisture in combustion gases/egr flow , venturi is located in front on engine ,(cooling fan blowing it also), and the sensor sitting on it cools down , water vapors inside condensate into water droplets on cooler sensor surface throwing codes. Volvo undated the venturi tube , from 2012 i believe, comes covered in some kind isolation, to prevent condensation inside sensor.
     
    Johny41, Mar 16, 2021
    Johny41, Mar 16, 2021
    #12
  4. Apr 10, 2021 #13
    crucar1800

    crucar1800 Light Load Member

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    64
    Sep 21, 2012
    0
    ***UPDATE***
    Found the cause of the moist build up. Apparently, The mixer pipe, which is the pipe that follows the venturi pipe towards driver side, had soot build up on it causing higher humidity. The original mixer pipe had about 600k miles. Since the mixer pipe was replaced the pulsating/intermittent idle soft noise was gone and the idle is continuously smooth. Venturi pipe was also replaced at the same time which means that the ports of delta pressure were already new or clean along with the mixer pipe. Venturi and mixer are two different pipes. please note.
     
    Last edited: Apr 10, 2021
    crucar1800, Apr 10, 2021
    crucar1800, Apr 10, 2021
    #13
  5. Apr 11, 2021 #14
    Lockport

    Lockport Light Load Member

    162
    109
    Mar 26, 2011
    Lockport, MB, CAN
    0
    I did and it solved all the codes. I noticed that the pipe is now coated in a Teflon type of finished unlike the galvanized appearance of the original.
     
    Lockport, Apr 11, 2021
    Lockport, Apr 11, 2021
    #14
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