Sorry forgot I made this thread originally. My oil pressure light keeps going off and on, seems to be a loose wire? I recently replaced the oil pressure switch. I can only assume the wire is loose or its a bad unit? Recently it has become solid. Usually the light kicks on after 10-15 minutes but turns off and on randomly when driving. Oil level is good. I drained it and checked. Basically full. I was hoping the oil pressure Guage would tell me an accurate reading of the actual pressure, and not just a light that is a mystery of the cause lol

Haven't driven the car in months though

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Look for rodent chewed wire harness.

Sure, a bad sensor or wire could if the oil pressure light go on and off, But, Occam’s Razer… the simplest cause is the most probable; the oil pressure is low. Bet it’s on most often when the engine’s hot and it’s at idle. Is that the case?

Does the oil light come on and stay on, rock steady, with the ignition switch on but the engine not running? (Checking for proper dummy light operation is a test everyone should do once in a while anyway.)

What limits the usefulness of an oil pressure gauge is that it only shows the pressure at one place - at the sensor.

"Oil level is good. I drained it and checked. Basically full."

???

This discussion reminds me of a buddy who has a Beemer with no dipstick. Checks the oil level from the driver seat.

PSA, most cars don’t work that way. The oil light means shut down, NOW!!! Figure out why later.

BTW, for the record, I think adding an oil pressure gauge is a great idea, as long as you understand what it can and can’t do. By the time tells you the oil level is low it’s prolly too late.

Is it worth my time to ask if there is a code P0520? That is the code that would indicate the EOP circuit is bad.
The switch sends a ground signal to the dash board light. It only connects to ground when no oil pressure. I suppose the wire could be chafed and occasionally hits ground. Otherwise, you need to hook a gauge up to check the oil pump. NEVER drive with an oil light on!

I used those in several of ,my old rods.... never had an issue with them leaking? A friend Did have one where the plastic oil line melted on the exhaust manifold....that was a mess

I'm torn between tossing money at it or just swapping the motor at this point.

Try just installing a new oil pressure sensor.

Oil pressure gauge does not have anything to do with oil volume, unless it is completely empty. I know this from blowing an engine up by cross threading the drain plug.
If the light is on when the key is on engine off the wires are good.