Originally Posted by Jayhovah

Agreed.. first thing to check is the wiring for the OEM sensor and your aftermarket sensor. Also you mentioned "stock oil pressure gauge" - do you mean the warning light? In the US we do not have an actual light for the stock oil pressure gauge.

If you get passed the easy troubleshooting stuff like making sure all the sensors are plugged in and the wiring is good, the very first thing I would do is disconnect either the OEM or your aftermarket pressure sensor and plumb a known good mechanical pressure gauge just to confirm you do in fact have an oil pressure problem.

You should consider consulting a professional for this.. running the car without oil pressure, even just for troubleshooting, can cause serious damage to your motor.



I'd argue that butt splices are inexcusable for any wiring in a vehicle =)