Hi all, my oil pressure would routinely sit at around 85 on the gauge - until I drove it today.Today it sat at half that, and wouldn't move much up or down, whether at 4000 rpm or at idle. No oil loss, no funny noises, no oil in water. However, car has just been in shop to have coolant system pressure checked as had a small leak, now fixed. I'm wondering if the sensor may have been disturbed or otherwise be playing up?
+1 on suspecting the sensor, and a good way to have some confidence that it isn't the gauge is to (key "on"): 1. unplug the wire from the sensor and don't touch the unplugged wire end to anything = the gauge should read nothing, then 2. touch the sensor wire end to ground (like the cylinder head or engine block) = the gauge should read maximum. If you pass those two tests = you can buy a new sensor as the least expensive next diagnostic step IMO. If you don't pass those two tests = not a good sign for the gauge.
FWIW.... I put a Tee in right off the oil pressure tap and added a small mechanical gauge right on the motor. My sending unit, or increasing resistance in one of the wire connections, would drop the on board gauge reading considerably when the car was fully warmed up. The mech gauge told me the OP was fine, vs the gauge reading. Doug
It's hard to get a decent sender. None are marelli and they have 2 ormaybe even 3 different size threads, so be aware of size when you order or make sure you get an adapter.
