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Alright a little update. I went to napa and bought a mechanical oil pressure gauge and hooked it up. Turned it on an it read around 28 psi on what I would say is a warm idle, settled at around 26 psi or so. No fluctuations at idle, kept solid. Rose accordingly when throttle was applied to about...

I can only speculate on how the previous owner treated the car, Aside from never waxing it all seems to point to them taking normal care of the car. Im thinking its the pressure sender that is wonky since it will just move around at a parked idle with AC and everything else off. It doesnt make...

It is possible I have a bad oil pressure deal too, it seems to fluctuate at idle between 12-19 psi, I can sit there any watch the needle move around. On the highway it sits at about 39 psi just cruising at 50. Cold (85 degrees, sitting for an hour or so) it is at around 40 psi till it warms up.

Thanks very much for the post. I will have to check or replace the sending unit to see if that fixes the issue. I believe the oil in it is 5-30, so maybe move to a 10-40 and see if the oil pressure is in a better range? Motor has 183k on it.

I would like to start off by saying Hello and that this is my first time here and this is my first XJ. I did own a 2002 JGC a few years ago, loved it. Anyway, I just picked up my 98 Cherokee yesterday. I noticed that it seemed like it was running very cool. It was barely getting above the hash...