Oil pressure PID

[odd boy]

Hi every one,

what PID should I log for oil pressure? I need it for LS-1, I found the one for E-38 under conditions.

thanks in advance

[Taz]

Try GM.ENGOILP ... I believe there are other PIDS for calculated oil pressure and oil pressure sensor voltage.


Regards,
Taz

[odd boy]

I found voltage, can we convert it to pressure?

[Taz]

If the scanner is connected to the LS1-B style PCM, or an appropriate VIN entered in the scanner ... GM.ENGOILP should be available. If the last PCM you scanned was an E38 ... scanner may be displaying PIDs appropriate for E38s.

OEM oil pressure gauge sender is usually 0 PSI (0 kPa) to 80 PSI (550 kPa). 0 PSI is equivalent to a resistance of 1 ohm, 80 PSI to 88 ohms. Can't recall the ohms / voltage relationship ... will need to look it up ... probably a way to convert if you are unable to select GM.ENGOILP

Regards,
Taz

[odd boy]

it won't be easy to relate Ohms with Volts, V=IR ========> volts = Current x Resistance

[Ninety8C5]

This works for the LS1_A PCMs.

[odd boy]

thx

[BustedTruck]

This works for the LS1_A PCMs.

I am having the same problem. I am a total newb just trying to learn. What do I do with the attatched file?

[joecar]

Copy it to: My Documents\EFILive\V7.5\User Configuration

[BustedTruck]

Copy it to: My Documents\EFILive\V7.5\User Configuration

Ok I have done that, but I still do not see the PID listed. What am I doing wrong?

[joecar]

On the PIDs tab, locate and select the pids GM.EOPS and CALC.OIL_PRESSURE;

to help in locating those pids, click on the column heading "Caption" (i.e. on the heading itself), this sorts the pid list alphabetically on this column (but in reverse order Z-A)... click on it again to un-reverse the order A-Z... look down this column for EOPS and OIL_PRESSURE;

if you can't find them, uncheck the Selected box at the upper left.

[BustedTruck]

On the PIDs tab, locate and select the pids GM.EOPS and CALC.OIL_PRESSURE;

to help in locating those pids, click on the column heading "Caption" (i.e. on the heading itself), this sorts the pid list alphabetically on this column (but in reverse order Z-A)... click on it again to un-reverse the order A-Z... look down this column for EOPS and OIL_PRESSURE;

if you can't find them, uncheck the Selected box at the upper left.


OK I've got those selected, now what?

[Ninety8C5]

You have to add that Calculated PID to the 'calc_pid.txt' file or rename the file in the above post to 'calc_pid.txt'.

[joecar]

You have to add that Calculated PID to the 'calc_pid.txt' file or rename the file in the above post to 'calc_pid.txt'.Ah, good point, I don't know what I was/wasn't thinking.

[BustedTruck]

Ok I have renamed the file to calc_pid.txt. when I click on the pid its not valid. Any idea what I am doing wrong? Thanks for being patient.

[joecar]

Rightclick on the pid to see what other pids it requires... the other pid is GM.EOPS, you have to select this also (does your vehicle support this pid?).

No worries.

[BustedTruck]

I am working on a 2005 tahoe drivetrain. I was able to view oil pressure sensor voltageEngine Oil Pressure Sensor Voltage . If you select both pids at the same time the calculated oil pressure becomes valid? When I right click to see whats required I get
{CALC.EOPS}

Expression:
V = Raw({GM.EOP})/51
is NOT valid because:
Unknown parameter {GM.EOP}, at position 13.

PID value cannot be determined because
the following error would occur:
Expression not valid: Unknown parameter {GM.EOP}, at position 13.

[joecar]

Hmmm... I get the same thing.

GM.EOP should still be a valid for the LS1A/LS1B PCM's, even when it's not wired to the PCM.

I pm'd Tech Support.

[Ninety8C5]

I am working on a 2005 tahoe drivetrain. I was able to view oil pressure sensor voltageEngine Oil Pressure Sensor Voltage . If you select both pids at the same time the calculated oil pressure becomes valid? When I right click to see whats required I get
{CALC.EOPS}

Expression:
V = Raw({GM.EOP})/51
is NOT valid because:
Unknown parameter {GM.EOP}, at position 13.

PID value cannot be determined because
the following error would occur:
Expression not valid: Unknown parameter {GM.EOP}, at position 13.


I don't know if you have a typo in the post or in your calc_pid file, but its suppose to be GM.EOPS.

[joecar]

There's CALC.EOPS and GM.EOPS is missing... and CALC.EOPS mentions GM.EOP.... and GM.EOP is unknown.

So something is messed up.

[joecar]

See this:
showthread.php?t=12586 (http://forum.efilive.com/showthread.php?t=12586)
showthread.php?p=66084#post66084 (http://forum.efilive.com/showthread.php?p=66084#post66084)

[Ninety8C5]

I have a Calc. Pid that uses GM.EOPS and is called Calc.Oil_Pressure (see below). It is pretty accurate for the LS1_A PCMs, but I haven't tried it with LS1_B PCMs.

# ================================================== ============================
# File details
# ------------
#
# This section defines various details about the file format.
*FILE
#Parameter Value Description
#---------- ---------------- ---------------------------------------------------
VERSION 7.1.1 File version
DECSEP . Decimal separator used in this file

# ================================================== ============================
# Units
# -------------------
# See sae_generic.txt for more information on the *UNITS section
*UNITS
#Code System Abbr Description
#-------- ---------- -------- -------------------------------------------------------------
PSI Imperial "PSI" "Pounds Per Square Inch"
# ================================================== ============================
# 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"

Sorry did not see your last post with the threads.

[Tordne]

It is an error in the sae_generics.txt file shipped in the software. If you copy your 'C:\Program Files\EFILive\7.5\Configuration\sae_generics.txt' file and find/modify the line as follows:

*CLC-00-943
V 0.0 5.0 .1 "Raw({GM.EOPS})/51"

[joecar]

Thanks Andrew.

[Sid447]

Will this be sorted out in an up-date?

As I miss this Oil Pressure option and am not a computer expert.
I used to be able to select this in previous V7.5's for LS1-B and haven't bothered since.

[Tordne]

The resolution will be included in the next update for sure.