Tapping into oil pressure system

Discussion in 'International Forum' started by kubasj05, Sep 15, 2019.

  1. kubasj05

    kubasj05 Light Load Member

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    Hi everyone, I am about to do manual oil pressure check. Where would be the best spot to hook up the oil pressure Guage on 2012 Maxxforce 13.
     
  2. Snow Monster

    Snow Monster Medium Load Member

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    Find the oil sensor on the engine, remove it and tap in there.
    Will tell you how accurate your gauge is, where if you tap in somewhere else it may be out a couple pounds one way or another from the oil sensor hole.
     
  3. Heavyd

    Heavyd Road Train Member

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    Easiest way is to remove oil pressure sensor and install the test fitting. Oil Pressure Test Fitting tool number is, 12-889-02.
     
    2013Maxx Thanks this.
  4. maneri1891

    maneri1891 Bobtail Member

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    Do we need that tool to remove and install the oil pressure sensor?
     
  5. Heavyd

    Heavyd Road Train Member

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    No, standard tools.
     
  6. Armond96

    Armond96 Bobtail Member

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    @Heavyd If I remove the oil pressure sensor to Put a manual gauge on, how can I stop the truck from shutting off due to no pressure?
     
  7. AModelCat

    AModelCat Road Train Member

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    Why not just use a tee fitting? Put the pressure sensor in one port and the test gauge in the other?
     
  8. Armond96

    Armond96 Bobtail Member

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    I was actually trying to google one but I’m not entirely sure of the size of fittings and stuff needed

    2016 n13 645k miles
    Deleted (not sure if a tune could be throwing the ecm off)

    for context my truck has an issue with oil pressure under load and high temperature

    I’ve replaced my entire oil cooler module with the crank case breather oil cooler etc

    My pressures by gauge are as follows

    before module
    Cold Start idle 40 psi
    Cold rev 48-50 psi
    Bobtailing 1500rpm 40 psi
    Heat soaked 1500 rpm 28-40 psi
    Hot idle 8-15 psi

    after module
    Cold start idle 40 psi
    Cold rev 60-70 psi
    all Other pressures are the same as before the module change

    the truck doesn’t knock (I may have heard a knock one time before it shut off but it could be my paranoia)
    or do anything else abnormal it logs code spn 100 fmi 18 religiously over 50 counts last time I checked the codes via dashboard

    other things I’ve done
    Checked the voltage the sensor was putting our by back probing the wires

    this was in tune with what the ecm is seeing

    other random things that may be related the truck is pretty wacky with all of the gauges that I believe are ran through the canbus/ecu

    fuel gauge jumps around
    Speedo jumps around
    Coolant temperature never goes above 140 degrees unless I’m in a hill pull with weight Jpro matches all figures the cluster is showing me

    (I’ve changed out coolant sensor for a new one and jumped the two pins together which pegged the coolant gauge to hot)

    voltage gauge
    Air pressure gauges
    Rpm are all accurate and stable

    so with all that being said it’s strange that the oil cooler module would only have an effect on cold start revving.

    also I can recreate any of the pressures I listed above which tells me it’s pretty consistent
     
  9. Heavyd

    Heavyd Road Train Member

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    We leave the sensor unplugged and reprogram it for warning only.