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Old Feb 3, 2018 | 11:39 PM
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Unhappy Oil Pressure PID

Hi I'm Ande..I've just swapped a 2003 LS1 into my 59 El Camino.. I was wanted know if theres anyone out there that can tell me what software ect to use on either PC computer, Iphone or Android tablet to display an oil pressure gauge????
... I've been looking all over the net for days, with no answer..

PLS HELP!

Annde Lee
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Old Feb 4, 2018 | 12:24 AM
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The Oil pressure sensor doesn't go to the PCM, just the dash gauge.

Take the signal wire from the oil pressure sensor and feed it into the PCM on Pin 58 of the Red/Green connector.
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Old Feb 4, 2018 | 12:39 AM
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Really? Thanks heaps for yr help mate.
... couple of questions though. How should I display it? What is vest software? I don't mind paying.
Do I have to "add PID" to view a gauge?

thanks heaps mate!

Ande
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Old Feb 4, 2018 | 12:58 AM
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Also, which wire should I use, there's 3¿

Ande
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Old Feb 4, 2018 | 01:11 AM
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It looks that
• organ/black wire is 12v
• tan/white is from oil pressure sender (the wire in question?)
• tan/white to fuel pump¿
the wire in question (according to diagram) is the
tan/white on the middle of the plug. Does this sound correct?

thanks heaps mate!

Ande
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Old Jul 21, 2019 | 12:11 AM
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Originally Posted by andelee
It looks that
• organ/black wire is 12v
• tan/white is from oil pressure sender (the wire in question?)
• tan/white to fuel pump¿
the wire in question (according to diagram) is the
tan/white on the middle of the plug. Does this sound correct?

thanks heaps mate!

Ande
Did you get this figured out? I'm trying to see oil pressure on my Torque app and if this works it will be great.
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Old Jul 21, 2019 | 09:21 AM
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Originally Posted by JoeNova
The Oil pressure sensor doesn't go to the PCM, just the dash gauge.

Take the signal wire from the oil pressure sensor and feed it into the PCM on Pin 58 of the Red/Green connector.
I'm not saying you're wrong here, but I've got conflicting info. If I look up a 2003 Vette it shows the Oil Pressure Signal on a 5V reference coming from Pin 7 on the PCM, and going to pin 58 already. Tan wire, white stripe. I'm not sure that helps much though. You still have to find a way to display it. I've got an Ultragauge for my LS Swap, but Oil Pressure is not one of the PIDs they display.
Joe
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Old Jul 21, 2019 | 03:37 PM
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JoeRJr, you are correct. The C5 Corvette uses an oil pressure gauge that ties into the PCM. As far as I'm aware that is the only vehicle with a Gen III engine that uses the PCM to display oil pressure information.

To get this to work you need the C5 Corvette oil pressure sender, the appropriate plug, proper wiring and to enable the option within the PCM. I use HP Tuners to modify the PCM settings but other software may be able to make the changes.
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Old Jul 21, 2019 | 04:47 PM
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True for the C6/E38 pcm as well - the oil pressure sender delivers its data to the computer.
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Old Jul 21, 2019 | 05:57 PM
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Most ditch EGR and use the EGR valve pintle position to monitor fuel, oil, or boost pressure. Very easy to do.
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Old Jul 21, 2019 | 06:29 PM
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My motor doesn't have egr....
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Old Jul 21, 2019 | 06:59 PM
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Originally Posted by Michael Yount
My motor doesn't have egr....
That's the point....you have a free wire for where you aren't using the EGR...
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Old Jul 21, 2019 | 07:18 PM
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ddnspider - trying to learn, so use a few more words in your responses, as if I were a 2nd grader.

If my pcm is already monitoring, or has potential to monitor, oil pressure from the sender, what do I need the free wire for? I don't understand....
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Old Jul 21, 2019 | 07:44 PM
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Originally Posted by Michael Yount
ddnspider - trying to learn, so use a few more words in your responses, as if I were a 2nd grader.

If my pcm is already monitoring, or has potential to monitor, oil pressure from the sender, what do I need the free wire for? I don't understand....
you don't need it,my comments were for the OP. If he doesn't have a way to monitor oil pressure then using the EGR pintle position is a way to do it.
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Old Jul 21, 2019 | 07:54 PM
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For OP's benefit (and my learning) - can you elaborate a bit? If the PCM egr monitoring algorithm is expecting some sort of signal related to egr function on that wire, how will sending an oil pressure signal there accomplish monitoring of the oil pressure? Or are some other changes (via tuning) needed to do something different with that oil pressure signal?
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Old Jul 22, 2019 | 06:07 AM
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Originally Posted by Michael Yount
For OP's benefit (and my learning) - can you elaborate a bit? If the PCM egr monitoring algorithm is expecting some sort of signal related to egr function on that wire, how will sending an oil pressure signal there accomplish monitoring of the oil pressure? Or are some other changes (via tuning) needed to do something different with that oil pressure signal?
The EGR pintle position is a 0-5V analog input to the ECU. HPT and EFI Live allow you to create custom PID's based off of various inputs of the ECU. So you create a custom PID that takes the EGR pintle position input and uses the equation of a linear line based on min/max pressure vs. output voltage of the oil pressure sensor. This allows you to log oil pressure.
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Old Jul 22, 2019 | 06:30 AM
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Thanks spider for taking the time. For most of us, this is not "Very easy to do." In fact, I went out of my way to put together a combo that worked well without me having to ever get into the pcm/ecu for any "tuning" - obviously because I didn't have a clue how any of that worked. So when you take the time to actually lay it out, we can follow along and gain an understanding of what's possible.

Now - what in the heck is a PID? LOL....
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Old Jul 22, 2019 | 06:53 AM
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Originally Posted by Michael Yount
Thanks spider for taking the time. For most of us, this is not "Very easy to do." In fact, I went out of my way to put together a combo that worked well without me having to ever get into the pcm/ecu for any "tuning" - obviously because I didn't have a clue how any of that worked. So when you take the time to actually lay it out, we can follow along and gain an understanding of what's possible.

Now - what in the heck is a PID? LOL....
PID is just a fancy way to say you're logging a parameter with the tuning software.....like coolant temp, intake temp, etc. Technically it usually involves a modification of a sensor input, but keeping it basic.....you're just logging stuff. So you log the oil pressure sensor, but all you see is a varying voltage.....not very useful. But if you know how the sensor works, you can turn the analog voltage into an actual pressure that the engine is seeing....much more useful.
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Old Jul 22, 2019 | 06:56 AM
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Proportional-integral-derivative perhaps? Now you've got me investigating stuff. No good can come from this....
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Old Jul 22, 2019 | 07:18 AM
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Originally Posted by Michael Yount
Proportional-integral-derivative perhaps? Now you've got me investigating stuff. No good can come from this....
Yes, but why I didn't type that....no point in confusing people. K.I.S.S.
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