2004 Jeep Wrangler sport 4.0
A week or so ago, the oil pressure started dropping out intermittenly at idle. Not slowly dropping but jumping up and down. I changed the oil pressure sending unit and all was back to normal so I thought. Then on the way to work today the OP was fine but I heard a clicking sound from behind the glove box. Turns out the AC compressor is cycling on and off.
Then when I went to leave work, the oil pressure gauge (stock Electronic type) never left 0 and check gauge light followed by warning sound came on immediately. I shut off the engine did some checking. I removed the plug to the sending unit and jumped that wire to ground and found the gauge still did not move telling me something from there to the gauge is messed up. To be safe I fired up the engine looked in valve cover through oil fill cap and I see oil pumping so I know I have pressure. Drove it a short distance and the oil pressure gauge returned to normal. Not sure whats going on.