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S2 R33 Owners, Need Your Input! Oil Pressure Gauge And Light Related

Akshunhiro

By Akshunhiro,
in Engines & Forced Induction

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Akshunhiro Rising Star

Akshunhiro

Posted
Posted

So, just wanted to check on what should be happening during ignition and engine run. My oil pressure light doesn't light up before starting nor come on when engine is running.

Checked voltage at the bulb and it appears to have 12v on both legs... I know it should light up before starting but only the CEL is coming on.

When turning ignition on, the pressure MAP gauge goes to 0 but the oil pressure gauge creeps up to just under the first line. Is this right? I didn't think it'd start to move until it detected pressure.

I know the stock oil pressure gauge is useless but my oil light isn't even coming on with ignition so trying to find what could be causing the fault. With the loom unplugged from the pressure switch/gauge I don't get anything either, no creep and no light.

Once the car is running, the pressure gauge creeps up to the first line but doesn't increase with revs. I'm not so worried about the gauge, more about the light but I still wanted to confirm if the oil pressure gauge creeps up when you turn the key to ignition.

I'm running an RB25DET Neo with a S2 R33 loom and Z32 ECU.

http://www.youtube.com/watch?v=ki47Ita4Ps4

http://www.youtube.com/watch?v=3N0mpzER8Gw

Akshunhiro Rising Star

Akshunhiro

Posted
  • Author
Posted

Having a look at ECU pinouts, it looks as though it goes straight to the dash. I'm wondering whether the 34 OPS is different to the S2 R33 OPS. Both are 2 pin plugs but if they're the opposite way around it could explain it...

Tried searching part numbers and couldn't find one for the R34 GT-T. I'd be very surprised if that's the case anyway.

AngryRB Grand Master

AngryRB

Posted
Posted (edited)

my guage only work when the engine starts, also my guage sits on that first line when its hot and idling, when cold its sitting on about 6 i think,

better off with a gtr dash, those gtst ones look very outdated and average.. :yes:

Edited by SliverS2
Akshunhiro Rising Star

Akshunhiro

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Okay, I'm a little worried now. Earthing either of the pins turns the oil light on/maxes the oil pressure gauge so I thought they might be the wrong way round. Given the limited room, I cut the plug off the neo loom and crimped spades onto the end to plug into the R33 loom. Now the light comes on and gauge sits at 0 and doesn't move once the engine is running...

Not concerned about the gauge, more-so the light.

GTSBoy Grand Master

GTSBoy

Posted
Posted

Just checking. You do know that they are not supposed to share the same switch/sensor? The light is connected to the pressure switch. The gauge is connected to the pressure sensor.

First things first. Pull the switch or the sensor out of the engine and crank it over. If you get a nice fat stream of oil coming out, then you have pressure and needn't worry about toasting the engine. Plus you get a nice mess to clean up.

Akshunhiro Rising Star

Akshunhiro

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Posted (edited)

Yes, thanks I realise that. The S2 uses a 2 pin plug which plugs into the OPS (switch/sensor both in one). One wire does the light, the other the gauge. Temp is a separate sensor on the 34 but still part of the stock oil heater/cooler.

Got it sorted though, I swapped to a known working sensor and the light works as it should. On with the engine off and off with the engine running. So, I do have oil pressure... phew!

Now to sort the tacho...

Edited by Akshunhiro

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