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weak oil pump, worn crank shaft bearing, or a bad oil pressure gauge all these can be contributing factors. Best place to start is with the pressure gauge.
The oil gauge shows the oil's temperature. The oil pressure gauge monitors the oil pressure for your viewing pleasure.
Connect the wiring harness to the back of your oil pressure gauge. Secure the oil pressure gauge with the retaining screws.
You will have to remove the oil sending unit/switch and screew a oil pressure gauge into it's place and then start the engine and read the oil pressure.
Defective gauge, defective oil pressure sending unit, low of oil, defective oil pump.
The stock oil pressure sensor on a 97 Saturn can be replaced with an oil pressure gauge for poundage info by first unscrewing the existing sensor. The new sensor can then be screwed into place and wiring ran to a suitable pressure gauge.
brakes, lights, oil, water, battery, air & gas
Six-year the oil pressure gauge for your 1999 Mitsubishi eclipse with the retaining screws. Connect the oil pressure gauge wiring harness.
"T" into the existing oil pressure gauge with brass pipe fittings. This way you will have the original oil pressure gauge and the mechanical oil pressure gauge. Don't forget to use thread sealer.
Need to hook up a oil pressure gauge in the place were the oil sending unit is on the engine and see what the gauge reads, You should have no less then 20 LBS. at a idle. If it does not have oil pressure then pump is bad.
If you have the correct weight oil in the engine, it sounds like the engine may be worn. If you haven't checked the oil pressure with a manual gauge (vs the dash gauge) that is a good place to start to verify that it is not a gauge/sensor problem.
Most oil pressure gauges operate by a varying voltage. The oil pressure changes the resistance in the oil sensor, causing the gauge to change readings.