R34gtt Oil Pressure Sensor

[Kinkstaah]

Hi All

I actually can't find this info anywhere, in the workshop manual, google, SAU, or the local greek oracle.

The R34 GTT oil pressure gauge is not the one that updates slowly and takes 20 minutes to tell you that you blew your engine up.

However mine is not working, and I can't find any info on how this thing is supposed to be wired, or even where the sensor IS, to confirm that its hooked up right/not at all/broken.

Every search result brings up info on installing additional oil pressure gauges but that's not what I want, I'd just like the stock one in the dash to work 'properly', or really just work at all. Essentially I used the point where it'd idle at when warm to determine if the engine oil was warm. And it was nice to see it move around with the throttle. Gave you that "This is working" feel.

Anyone got any info on how this thing works?

Edit: Workshop manual has some stuff as to where it is (I learned to look better) but not much on how it gets wired to the dash. Would love to be able to identify the part that is not plugged in right

[scotty nm35]

Meh. Go aftermarket for the quick response Greg.

The sensor should be hanging off the side of the block, behind the water/oil cooler block. It will be the big one there, the small one is temp.

Like I said, if you need an a new one the VQ one I have here should be the same, but I would say seeing we reshelled the car, the wiring probably isn't hooked up. Did the old shell have the pressure gauge? if not the wires probably aren't in the loom, being an NA pos.

[Kinkstaah]

Nah man that was the coolant sensor - This has been fixed because the VCT plug and the Coolant sensor plug are interchangeable in the R34 (who knew!). That has since been sorted.

This worked after reshelling, this is the oil pressure lamp. I've found where it should be with the workshop manual, but it doesn't mention how it's supposed to be plugged in/wired to the gauge itself. I assume there's a plug that plugs into the stock sensor somehow.

The R34 (NA and GTT) have a functional oil pressure guage, not the old R33/32 (GTR/GTST) etc one that is slow and crap and useless. The R34 one actually responds instantly.

It just mentions to test it with the "3.4W test lamp" and it'll read differently to it being shorted out. Given my guage reads EXACTLY where the "3.4W test lamp" indicates, I expect something is literally plugged in wrong or to the wrong line (or not plugged in).

But.. what?

[scotty nm35]

Perhaps the temp and pressure are mixed up? pretty sure the plugs are different though. The wires won't stick far out of the loom, you will need to stick your head down there and have a look what is plugged into it I guess, or take it back to the engine builder to find seeing it worked when you took it there...

[Kinkstaah]

This is all the workshop manual has to say about it...

I imagine it should be plugged...somewhere.

From what I have seen in the manual the temp sensor and pressure sensor are infact different sensors (and plugs?)

Sticking the head in there is the plan.. I have to anyway as there's a boost leak (of course there's a boost leak...) but helpful to know if anyone knows what plug goes where.

[breaker1845]

If you have tested the circuit on the board and it works with the test lamp then I suspect the problem is between the oil pressure sensor plug on the block and the wiring between it.

As Scotty said the pressure sensor plug hangs off the block and it is fairly big compared to the other sensor there. Check that is connected properly and trace it back towards the dash.

The coolant temp and oil pressure plugs are different sizes/shapes from memory so don't think they can be mixed up.