I've been reading various forums trying to come up with an answer to my oil pressure issue.
I have 2000 TJ 4.0L.
After lots of driving the oil pressure will drop to 0 and make the idiot light come on. It appears that once I change the oil the problem goes away for a little bit, but it's coming back on. The engine will stutter at a light when the pressure drops but it's fine after I get going again.
The oil is at the right level. I took it to the local Jeep dealership and they said it was fine, but I don't think they ran it long enough for the problem to come up. They said that the oil could be thinning and causing the problem. I've NEVER heard of that before. The dealer doesn't have a good rep.
The gauge on the dash is not accurate at all. Mine stays pegged but I have tested with real pressure gauge and it was fine. I would test it with a better gauge, It could be your sender unit (most likely) or an oil pump if the pressure truly is low
How many miles do you have? If its high mileage, I would think when your oil warms up its thinner and your bearings may be worn thus the drop in pressure. I have been fighting this for a year now. A can of stp oil treatment has helped alot.
All politicans are crooks. They should have to work and pay for everything like we do.
Oil pump bad on a 4.0 with only 140k miles on it? Guess it's possible but the oil pumps usually are the last part to go since they're so well lubricated. I would have almost guaranteed that it was the sender also. Oh well. Good luck!