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Isx what is your idle oil pressure

Discussion in 'Trucks [ Eighteen Wheelers ]' started by bigNATURE, Sep 12, 2013.

  1. Sep 12, 2013 #1
    bigNATURE

    bigNATURE Medium Load Member

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    May 5, 2013
    Texas city, tx
    0
    It's been about 10thousand miles since my last oil change in my 2009 ISX and I just started getting some low oil readings to. I just changed my exhaust back pressure sensor a week or so ago and that's been helping greatly. When I accelerate or am at cruzing speeds of 1200-1300 rpm's my oil pressure is fine, reading about 35-40 psi. But when idling I've dropped down to 20psi... And even getting a check engine warning light come on, but may or may not be due to oil pressure, but then would go right back of... I'm planning on changing the oil pressure sensor possibly but I do have a few 20thousand miles left on my engine warranty... I got 535000 mi on my ECM.... Anybody care to shed any experience on this?.... What are your idle PSI and does that suit you... A good mechanical mind I know says 20PSI is fine at idle and what I'm reading while running is good as well, so again I ask the community here, what are you idle PSI
     
    bigNATURE, Sep 12, 2013
    bigNATURE, Sep 12, 2013
    #1
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  3. Sep 12, 2013 #2
    baha

    baha Road Train Member

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    Jul 25, 2013
    ga
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    U doing slot of idleing? a Tstop oil desk/top CK. of oil will tell if a small bit of fuel is knocking press. down
     
    baha, Sep 12, 2013
    baha, Sep 12, 2013
    #2
  4. Sep 12, 2013 #3
    bigNATURE

    bigNATURE Medium Load Member

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    May 5, 2013
    Texas city, tx
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    The only time I idle is at stop lights and when I come to a stop. I have APU, and don't idle.
     
    bigNATURE, Sep 12, 2013
    bigNATURE, Sep 12, 2013
    #3
  5. Sep 12, 2013 #4
    baha

    baha Road Train Member

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    ga
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    a oil pump was bad (gear was pressed on shaft no key to hold from slipping on shaft] ck 2 see if UR has been replaced
     
    baha, Sep 12, 2013
    baha, Sep 12, 2013
    #4
    bigNATURE Thanks this.
  7. Sep 13, 2013 #5
    Blind Driver

    Blind Driver Road Train Member

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    Aug 7, 2006
    New Albany, IN
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    After a oil change, about 28 psi. After 10k it drops to 24, at 15k I'm lucky to have 20.
     
    Blind Driver, Sep 13, 2013
    Blind Driver, Sep 13, 2013
    #5
    bigNATURE Thanks this.
  8. Sep 17, 2018 #6
    Tony1975

    Tony1975 Bobtail Member

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    0
    Aug 22, 2018
    0
    I have a 2007 volvo with Cummins ISX it's more then normal on those type of engines to run that low on pressure mine on idling it's 17 running a little over 40
     
    Tony1975, Sep 17, 2018
    Tony1975, Sep 17, 2018
    #6
  9. Sep 17, 2018 #7
    Expeditor

    Expeditor Medium Load Member

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    Mar 5, 2018
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    Yes I've heard they can run low oil pressure. Check for fuel dilution, as in a oil sample.
     
    Expeditor, Sep 17, 2018
    Expeditor, Sep 17, 2018
    #7
  10. Sep 18, 2018 #8
    mitmaks

    mitmaks Road Train Member

    2,541
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    May 16, 2014
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    I have 13 Kenworth with ISX. idle is 20 psi, running 1500 rpm its 40psi
     
    mitmaks, Sep 18, 2018
    mitmaks, Sep 18, 2018
    #8
  11. Nov 30, 2018 #9
    Roteck

    Roteck Light Load Member

    225
    100
    Dec 18, 2016
    Abilene, TX
    0
    I noticed sometimes that my idle oil pressure will drop to about 24psi when it's normally 30-40psi. I also noticed that idle fuel usage is lower the lower the oil pressure. It's random on mine and I think something is wrong with it somewhere. Usually I'll idle at 700 RPM and get around 0.7 to 0.8 gal/hr on idle fuel usage but sometimes after a long hard drive of doing 70 with 40k in the trailer it'll idle real low on pressure. Still 700 RPM but oil pressure is down to 24 and fuel usage is as low as 0.3 gal/hr. I'm scared I have an injector not injecting or something else seriously wrong. I'm taking it in the the shop to get all this stuff checked out as well as a dyno and blow by test just cause I'm scared #### less that Imma have a huge bill in the next couple months. When it does idle low like this I'll idle it up enough to get at least 30 psi oil pressure as someone told me that's the safe bet. I don't idle a lot because I have an APU but I notice it during my cool down periods usually. You can idle up a KW by turning off cruise control and holding the resume button. Or idle down by having cruise off and holding the set button. Also you can idle up much higher like when it's -50000 degrees by turning on cruise control and holding set.
     
    Roteck, Nov 30, 2018
    Roteck, Nov 30, 2018
    #9
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