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Thread: Engine Oil Pressure PID

  1. #21
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    Quote Originally Posted by Blacky View Post
    The GM.EOPS PID is now back in the config file, however the LS1 controller returns the value as a voltage between 0 and 5 volts. The default conversion factor and offset for LS1 controllers is:

    kPa = V*1103.125-110.3125
    or
    psi = V*160-16

    Correction, the factors should be:
    1103.125/5=220.625 for kPa and
    160/5=32 for psi.
    The offsets remain the same.

    I recommend creating a calculated PID to display the oil pressure in kPa or psi. I have not yet worked out what the conversion factor is for other controllers (i.e. Duramax Diesel).

    For LS2 applications, use PID GM.ENGOILP which is returned in kPa. GM.ENGOILP is not available in LS1 platforms, which is why you need to create a calculated PID based on GM.EOPS.

    Warning: The factor and offset shown above are calibrated values and on some controllers may be different than the constants I described here.

    Regards
    Paul

    Have a LS1 Vx commodore... have been loging eops and can see the voltage in BBLlog... Can some one point me in the right direction to a thread that will tell me where and how to enter the above information... would love to read it in PSi and have a alarm in BBL for low oil when running the 1/4

    Shane
    I ate my bowl of Aussie rice for dessert, Main course was imported rice...

  2. #22
    EFILive Developer Site Admin Blacky's Avatar
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    Example of how to create a calculated PID:
    http://forum.efilive.com/showthread.php?t=132

    Another one:
    http://forum.efilive.com/showthread.php?t=10

    Regards
    Paul
    Before asking for help, please read this.

  3. #23
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    Lol going to have to do so some more reading crap that is confusing...
    I ate my bowl of Aussie rice for dessert, Main course was imported rice...

  4. #24
    Lifetime Member Ninety8C5's Avatar
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    I played with this in the Options.ini file, but the V2 does not seem to know how to subtract. I haven't tried it lately and don't know if it would work now.

    *PCU
    ;
    ; PID Caption Prec Units Op Factor Offset
    ; -------- --------- ---- ----- -- ------------- -------------
    PCM,EOPS, EOPS, 1, psi, *, 32.0, -16

    Or you can add this to the C:\Documents and Settings\Owner\My Documents\EFILive\V7.5\User Configuration\calc_pids.txt file.

    # ================================================== ============================
    # Add slot definitions here
    # --------------------------------
    # See sae_generic.txt for more information on "SLOT" formats
    #
    #Units Low High Fmt Expression
    #------------ ------------- ------------- ---- --------------------------------------------------------------
    *CLC-00-043
    PSI 0.0 150.0 0.0 "({GM.EOPS}*32)-16"

    # ================================================== ============================
    *PRN - Parameter Reference Numbers
    # --------------------------------
    # See sae_generic.txt for more information on the *PRN section
    #
    #Code PRN SLOT Units System Description
    #------------------------- ---- ------------ ---------------- ---------------- -------------------------------
    CALC.OIL_PRESSURE F043 CLC-00-043 PSI Testing "Engine Oil Pressure"
    Last edited by Ninety8C5; July 9th, 2008 at 07:52 AM.

  5. #25
    EFILive Developer Site Admin Blacky's Avatar
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    Quote Originally Posted by Ninety8C5 View Post
    I played with this in the Options.ini file, but the V2 does not seem to know how to subtract. I haven't tried it lately and don't know if it would work now.

    *PCU
    ;
    ; PID Caption Prec Units Op Factor Offset
    ; -------- --------- ---- ----- -- ------------- -------------
    PCM,EOPS, EOPS, 1, psi, *, 32.0, -16
    I tried this just now and it appears to work ok.
    Regards
    Paul
    Before asking for help, please read this.

  6. #26
    Lifetime Member Ninety8C5's Avatar
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    Quote Originally Posted by Blacky View Post
    I tried this just now and it appears to work ok.
    Regards
    Paul
    It seems to work and is reasonably close to the 'Oil Pressure' gauge. The digtal readout on the car seems to read a little lower, but close.

    Thanks

  7. #27
    Senior Member Wolfie's Avatar
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    Has anyone tried using the calc_pids.txt file?
    I got an PSI error, so changed PSI to psi.
    That worked, but then I get a slot error.
    Have a 2007 Express with a LQ4 6.0
    Wolfie
    LS1B 2007 Express 6.0 /w 470,000+ miles (parked as of 01April2011)

  8. #28
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    so did i read this correctly that even with a custom pid we can not use this on a 2000 F-body?

  9. #29
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Cablebandit View Post
    so did i read this correctly that even with a custom pid we can not use this on a 2000 F-body?
    Yes correct, for F-body, the oil pressure sensor feeds the IPC and not the PCM.

  10. #30
    Joe (Moderator) joecar's Avatar
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    Is EOP working (for C5 Z06)...?

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