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2G Oil pressure sensor wiring

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tschuhly

Proven Member
202
58
Nov 6, 2024
York, Pennsylvania
When installing my aftermarket oil pressure sensor, should I splice it into the ECU (with ECMLink)? It doesn't look like there is a dedicated pin from factory for this so I'm wondering what I should do?
 
Solution
Do you think it's worth it though to log oil pressure or should I save the limited spots for something else? So far I have oil psi, boost, afr.
You can use same sensor ( maybe) if its a 5v sensor to log fuel pressure.This is a better use of a log 🪵.

For something like oil pressure which is a lill more important to monitor live, use a gauge.

Looking back at a log of low oil pressure doesn’t do much when you have a starved/scared or seized engine.

But you can more likely survive a fuel pressure drop depending on a circumstance.
Do you think it's worth it though to log oil pressure or should I save the limited spots for something else? So far I have oil psi, boost, afr.
 
Do you think it's worth it though to log oil pressure or should I save the limited spots for something else? So far I have oil psi, boost, afr.
That entirely depends on your needs. For a street car, probably not. A gauge with a peak recall capability is usually enough, like AEM X-Series.
I'd personally sooner log fuel pressure before oil pressure for a street car.
 
Do you think it's worth it though to log oil pressure or should I save the limited spots for something else? So far I have oil psi, boost, afr.
You can use same sensor ( maybe) if its a 5v sensor to log fuel pressure.This is a better use of a log 🪵.

For something like oil pressure which is a lill more important to monitor live, use a gauge.

Looking back at a log of low oil pressure doesn’t do much when you have a starved/scared or seized engine.

But you can more likely survive a fuel pressure drop depending on a circumstance.
 
Solution
You can use same sensor ( maybe) if its a 5v sensor to log fuel pressure.This is a better use of a log 🪵.

For something like oil pressure which is a lill more important to monitor live, with a gauge.
To clarify, your saying that I should log oil psi over fuel psi?

Right now I just have a fuel gauge on my AFPR.
 
Oh sorry I just reread it and I gotcha now. Your saying that it wouldn't really make sense to log oil pressure because it should be constant and if you don't have it, then it you can't exactly run a log to begin with because you'll break the engine if it's not broken already.

Whereas fuel pressure is something that can fluctuate based on setting and stuff.
 
Oh sorry I just reread it and I gotcha now. Your saying that it wouldn't really make sense to log oil pressure because it should be constant and if you don't have it, then it you can't exactly run a log to begin with because you'll break the engine if it's not broken already.

Whereas fuel pressure is something that can fluctuate based on setting and stuff.
100%
Use your 4 availible pinouts wisely. Oil is important but a real gauge is good enough. The dash gauge is basically a dummy
 
Oh sorry I just reread it and I gotcha now. Your saying that it wouldn't really make sense to log oil pressure because it should be constant and if you don't have it, then it you can't exactly run a log to begin with because you'll break the engine if it's not broken already.

Whereas fuel pressure is something that can fluctuate based on setting and stuff.
oil pressure is not constant by any stretch of the imagination, but keeping tabs is easy with a gauge. a peak-style/recall feature is handy to know your max when your eyes should be the road.
 
oil pressure is not constant by any stretch of the imagination, but keeping tabs is easy with a gauge. a peak-style/recall feature is handy to know your max when your eyes should be the road.
Sorry, I meant that it's not an adjustable thing like boost or fuel pressure. The range is constant, but maybe that's incorrect too.
 
I have owned DSMs for almost 30 years. I have never logged oil pressure, but I loved having a real time gauge. Crazy part is I used to run an analog one back in the day with the vinyl hose. :p Fuel pressure I feel does not need to be monitored all the time (just periodically checked) like air fuel ratio does. If I had 2 inputs and had to pick what to log, it would be boost and AFR. That is just me.
 
Sorry, I meant that it's not an adjustable thing like boost or fuel pressure. The range is constant, but maybe that's incorrect too.
No, that's correct, it should be reproducible depending on oil temperature and is entirely RPM dependent much like fuel pressure is intake pressure/vacuum dependent. However, it's much easier to maintain a constant oil pressure to give enough time to view on a gauge. I figure that's what you meant
 
I have owned DSMs for almost 30 years. I have never logged oil pressure, but I loved having a real time gauge. Crazy part is I used to run an analog one back in the day with the vinyl hose. :p Fuel pressure I feel does not need to be monitored all the time (just periodically checked) like air fuel ratio does. If I had 2 inputs and had to pick what to log, it would be boost and AFR. That is just me.
If two, same. Incorrect fuel pressure, while not providing an exact number, would at least present as an AFR inconsistency. Very "out of the ordinary" MAF compensation/VE requirements would also occur. Once you see that weirdness, one could swap to a fuel pressure sensor as an input temporarily to see if that's the underlying issue.
 
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