High oil pressure is good....
Make sure oil level is good. Ensure oil pump is good by testing pressure output with direct reading gage. If both are O.K. replace oil pressure sending unit located by the oil filter.
The oil pressure sensor sends a reading to the gauge so you can moniter the engine's oil pressure. No oil pressure means the engine is in big trouble.
A low oil pressure reading when idling for a 1986 Fiero is normal. As long as the oil pressure goes back to normal when the car is being driven, there should be no problem. If it is not, then the oil pressure sensor or the oil sending unit should be looked at.
Somewhere in the side of the motor is a sensor called the oil pressure sensor. Unscrew that sensor and screw in the line for reading the oil pressure. Start the motor up and get your reading. Compare it to specs.
My oil pressure is usually slightly below the 40 mark on the oil guage.
If you are asking if the engine will shut off when the sensor does not detect oil pressure, the answer is no. It will run without an oil pressure reading.
Need oil change or oil pump weak or oil pressure sending unit not reading properly.
Oil pressure shouldn't register at all until the engine starts and builds up pressure.
It could cause a high reading on the gauge.
Because high oil pressure is good...
Check your oil pressure gauge, if your just going by what it says the gauge might be wrong Iv had this happen bout 4ish times and its always the tube running to the oil pressure gauge is pinched so its not getting a good reading.