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Thread: Engine Oil Pressure PID

  1. #11
    Lifetime Member Kevin Doe's Avatar
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    Quote Originally Posted by Blacky
    Have you tried (re)validating PIDs using the menu option: Info->Validate PIDs.
    If that does not help (probably won't if you are not seeing it at all, even as "non supported"), let me know and I'll dig into this issue deeper.

    Can you please tell me what operating system your LS1 is?

    Regards
    Paul
    Yes, I tried several times to revalidate the PIDs, but it still doesn't show up.

    My OS is 12587604.

    In EFILive Scan 7.4 I was the PID GM.EOP was available and logged in kPa,Psi. If you find an issue is there any chance you have updated software that will include a fix for this by April 11th? Just curious because I'd like to log engine oil pressure for my first track day. Not sure how fast your turnaround is or what your plans are for rolling in all these new fixes we just found.

  2. #12
    EFILive Developer Site Admin Blacky's Avatar
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    I will be updating the software before the end of the week. I expect the oil pressure PID to be fixed in that release.
    Paul
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  3. #13
    EFILive Developer Site Admin Blacky's Avatar
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    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
    Last edited by Blacky; March 25th, 2008 at 02:45 AM.
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  4. #14
    EFILive Developer Site Admin Blacky's Avatar
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    The BB Logging PID: EOP, was configured to convert the PID voltage to kPa, but it cannot be configured with a constant factor and offset as they are calibrated values in the LS1 controller.

    It will be changed to return volts and renamed to EOPS - exactly the same as the V7.5.x software.

    Regards
    Paul
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  5. #15
    Lifetime Member emarkay's Avatar
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    So EOP is now available for what year LS1's?
    Early EFILive V5 user - Upgraded from AutoTap for DOS!
    2000 Chevrolet Camaro Z28, A4 - For occasional day trips...
    1984 Chevrolet Caprice Classic - For the family...
    1989 Honda VTR250 - For me and me only...

  6. #16
    EFILive Developer Site Admin Blacky's Avatar
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    ALL LS1's, except those LS1's that do not have an oil sender connected to the PCM. (i.e. F bodies). The PID is still valid on those PCMs but it does not return oil pressure data.

    Regards
    Paul
    Before asking for help, please read this.

  7. #17
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    Kevin -

    I'm a drag racer with a 9 sec 2000 C5 Coupe running a C5R 427 blower car. My V1 was stolen in Memphis last year at the LSX shootouts. I now have a V2and am patiently waiting for BBL to arrive. I use this on one car for dragracing! I am intrigued by the Oil Pressure PID. Do you think the signal from a 2000 GM PCM oil pressure sender "could" be used to trigger a engine safety shutoff? Your thread here got me to thinking!

    JR

  8. #18
    EFILive Developer Site Admin Blacky's Avatar
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    Quote Originally Posted by JR-CRUZN-C5 View Post
    Kevin -

    I'm a drag racer with a 9 sec 2000 C5 Coupe running a C5R 427 blower car. My V1 was stolen in Memphis last year at the LSX shootouts. I now have a V2and am patiently waiting for BBL to arrive. I use this on one car for dragracing! I am intrigued by the Oil Pressure PID. Do you think the signal from a 2000 GM PCM oil pressure sender "could" be used to trigger a engine safety shutoff? Your thread here got me to thinking!

    JR
    There is provision in the 2000 PCM for the engine to shut off due to low oil pressure. Is that what you mean?
    Paul
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  9. #19
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    Blacky -

    Yep - That's exactly what I mean. But I wonder if the GM safety margin is fast enough to save a racing engine from catistrophic failure due to a broken or failing oil pump during a run???

    JR

  10. #20
    EFILive Developer Site Admin Blacky's Avatar
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    Can't say for sure, but probably not. I think the built in shut-off and logging of the shutoff reason is just to help the dealer pinpoint why the bearings are all munched up.
    I don't think it is there to save anything before it gets damaged.


    Paul
    Before asking for help, please read this.

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