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I got sick of my oil pressure reading very low when warm (0 to .5 on the factory guage) so i decided to replace the sensor. You will need an open ended 17 mm spanner and you will need to undo a hose clamp (mine was a small socket to undo) this side of the engine bay. undo the bottom fuel line hose clamp and slide it off (it is the return line so there is no pressure in this line but some fuel will dribble out so be careful) this is the fuel pressure sensor about 20 cm below the fuel line hopefully you can see it in focus down there with a rubber gromet over the plug on the left hand end of it. this is what the plug looks like with the grommet pulled back. fairly easy to remove. you need to get a 17mm open ended spanner on the sensor to undo it. this is the new sensor i bought off ebay from nissan of chesapeake in usa. it cost me $95 delivered here. and this is the end result. a good oil pressure reading in the cluster guage. may not be highly accurate but it would certainly be able to warn you of a problem before it does too much damage.

I fitted some Defi gauges a little while back with the intention of fitting an oil cooler but never got around to doing so and felt if my temps (with light track work) never got too bad I wouldn't worry with the cooler. But as the factory Nissan temp sensor is M12 x1.25 thread and the defi sensor is 1/8NPT I could never fit the temp sender and effectively had a useless gauge. I spent ages trying to find an adapter through just about every gauge, fitting, performance site and store within Australia and could only come up with suppliers from the UK with shipping worth more than I could justify. I could find adapters that were M12 x 1.50 and M12 x 1.00 but not 1.25 as it's a very odd size. Finally I found a local supplier on ebay that sells them - http://www.ebay.com.au/itm/Metric-Male-M12x1-25-To-Female-1-8-NPT-Also-Use-For-Pfira03-Fitting-/151195760051?pt=AU_Car_Parts_Accessories&hash=item2333f835b3 All I did was fit an o-ring around the M12 thread that goes into the factory oil temp sensor location to seal it up (thread sealant would do the same but I didn't have any) and thread tape around the Defi sensor. I was a bit worried as the sensor tip did not stick out a great deal from the end of the adapter and not getting a true reading but the adaptor looks to thead in just as far as the factory sender and after taking my car for a run it seemed to work near spot on. The temps warmed up relatively similar and after a good freeway run with 30degree ambient temps in Adelaide the oil temp was within 5 deg C to the coolant temp which is what I expected to see.

wtb oil sender unit for an RB25 Need the oil Gauge sender unit for an RB25. mines not working In Sydney thanks

Hi guys and girls, Does anybody have a HR31 fuel pump bracket and sender laying around that they would sell to me? I don't need the pump, just the bracket and sender unit. Thanks, Geoff.

Hi all, been a while since iv posted here. In a nutshell im running a haltech e11v2 piggybacked onto the stock ecu (was to run auto) and basically something is giving noise to the ecu via the temp sensor, it can vary up to 30 degrees cycling as often as every half second or so. This causes big idle problems from shutting off to blowing smoke etc. Iv tried running both the wires separately (not both at the same time) to the ecu and the noise is still there. Iv not been able to find anything out there with anyone having the same problem. Iv also tried a different sensor. The feed is getting 4.88V and the other is shared ground with the tps. That of which also gives me problems time to time. The noise is only there whilst engine is going and its not relative fluctuations to RPM. Any pointers would be appreciated! cheers.