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Old 08-06-2020, 04:41 PM   #1
truck7575
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Default Oil pressure question

So i installed an oil pressure sensor and gauge on my 08 sti.. The oil pressure at idle is reading 8psi.. It does come up to around 50-60psi with rpms.. The sensor and sending unit are in the intake valley back towards the left center of the engine... This number seems low to me... What about you all? What should it read and does rhe sensor location make a difference on what the reading will be?

Thanks
Rick
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Old 08-06-2020, 04:59 PM   #2
Samurai Jack
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Can you post a pic of exactly where you put the sensor?

That pressure is way too low.
On my 207, Oil Pressure is/was about
- Cold Start - 95 PSI
- Hot Idle - 35 PSI
- Hot Running - 75 PSI

There are two (2) location points on the top of then engine where you can install a sensor. Sounds like you have one of them.

Could just be a problem with your install or the wrong sensor for the gauge you are using.

What gauge and what sensor?
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Old 08-06-2020, 05:03 PM   #3
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Prosport
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Old 08-06-2020, 05:04 PM   #4
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The gauge came with the sensor and sending unit.. I installed a boost gauge also from the same company.
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Old 08-06-2020, 05:04 PM   #5
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I have a Prosport sensor and I’m using the plug where the factory sensor as and when my oil is hot in the 210-220 my oil pressure is around 15-20 at idle
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Old 08-06-2020, 05:07 PM   #6
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Quote:
Originally Posted by Haevn View Post
I have a Prosport sensor and I’m using the plug where the factory sensor as and when my oil is hot in the 210-220 my oil pressure is around 15-20 at idle
I think you better check those numbers
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Old 08-06-2020, 05:08 PM   #7
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I think hes saying system temperature?
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Old 08-06-2020, 05:15 PM   #8
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Quote:
Originally Posted by truck7575 View Post
I think hes saying system temperature?
i certainly hope so.

As for your gauge issue, I'd start by re-checking your install, making sure all the wires have proper contacts, no bare wiring, etc.

I don't remember the ProSport gauges as being high quality, hence people in the past have had issues. If you confirm your install is correct per the directions, then maybe you have a bad sensor / gauge / both.

Ring up ProSport after you confirm your install was correct.
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Old 08-06-2020, 05:19 PM   #9
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Is there a way to double check the pressure in another location via another method to confirm what it actually is? I dont wanna be driving it with pressure like that if it's actually low.
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Old 08-06-2020, 05:30 PM   #10
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When I get home I’ll post a pic at idle. My friend has an aem oil pressure gauge and reads same has mine at idle
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Old 08-06-2020, 05:33 PM   #11
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https://drive.google.com/file/d/1nsOMGfxHjkAvcEn860XxXVhtVXDgIWCc/view?usp=drivesdk
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Old 08-06-2020, 05:35 PM   #12
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Nice setup
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Old 08-06-2020, 05:44 PM   #13
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Quote:
Originally Posted by truck7575 View Post
Is there a way to double check the pressure in another location via another method to confirm what it actually is? I dont wanna be driving it with pressure like that if it's actually low.
You can try installing the sensor in the other port. Remember it's not just about trying to get pressure, it's trying to get pressure in the right location to have any valuable meaning.

I take it this is not originally your car?
How many miles?
How was it treated by the previous owner? Any idea?
Is the motor stock or modded?
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Old 08-06-2020, 05:46 PM   #14
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Thats what i mean or some other gauge i can use as a backup method without uninstalling my current setup until i kmow its the location.
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Old 08-06-2020, 05:51 PM   #15
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Other questions:

Do you know if the oil pick-up has ever been changed?
One big issue, which can result in low oil pressure, is a cracked OEM oil pick-up tube. If it breaks or cracks severely, low to no oil pressure = engine and owner extremely sad.

I changed mine out at 100K on my 205 and it was cracking. Installed a KillerB pick-up and never looked back and moved them to my 207.

I'm not saying that is what it is, but it is a known problem.
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Old 08-06-2020, 06:23 PM   #16
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Im inclined to think that i have that issue.. Unlikely that a brand new setup in a location known to give accurate pressures would read low.. Would like to test with another method to confirm before forking out the dough on a new pickup since ill likely get their oil pan too haha...
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Old 08-06-2020, 07:23 PM   #17
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Killer bee oil pan and ultimate intake ordered.. Stay tuned
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Old 08-06-2020, 07:32 PM   #18
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Quote:
Originally Posted by truck7575 View Post
The sensor and sending unit are in the intake valley back towards the left center of the engine... This number seems low to me... What about you all?
I'd like some clarification on the location. Is it under the Alternator, or towards the rear of the engine near the turbo.

If it's at the front location, then that pressure is low. At the rear it may be normal.

Some follow-up questions are what oil, and how long has I been in there?

Quote:
Originally Posted by truck7575 View Post
Killer bee oil pan and ultimate intake ordered.. Stay tuned
Thank you! If you have any questions once you get your hands on it, let me know!
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Old 08-06-2020, 07:34 PM   #19
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I got their hardware kit for it too.. Anythi g i should know.. Seems like a pretty easy install.
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Old 08-06-2020, 07:45 PM   #20
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its a pain to take off the pan.. a lift would be good
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Old 08-06-2020, 07:47 PM   #21
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Lol i figured that.. But this is the first car ive ever owned that had full acces to drop the pan easily.. Figured there was a catch.. I use a quickjack BL-7000SLX so i think it should be an easy install...
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Old 08-06-2020, 08:03 PM   #22
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Quote:
Originally Posted by truck7575 View Post
Nice setup
thanks!
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Old 08-06-2020, 08:05 PM   #23
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Quote:
Originally Posted by Samurai Jack View Post
I think you better check those numbers
what is wrong with those numbers?
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Old 08-06-2020, 08:11 PM   #24
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You just worded it funny i think the number that was over 200 he was thinking u were saying was your oil pressure
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Old 08-06-2020, 08:26 PM   #25
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You just worded it funny i think the number that was over 200 he was thinking u were saying was your oil pressure
o lol made it seem like 220* oil temp was high lol
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