My oil pressure gage is at 0! I gave plenty of oil but it won't budge! Today I even replaced the gasket on the head valve and nothing. It's a 2000 xj sport. 4.0l engine. Anyone have any ideas of what the problem is or could be? Thanks

Check to see if the wire is plugged into the sending unit?

Hook up a mechanical oil pressure gauge to be sure. If very low, or nothing still..well i guess start looking for a new longblock

Is it running fine and having the gauge read 0 or is it running like crap and having the gauge read 0? It its running fine its probably just the oil sending unit.

when my unit went it pegged past 80

It seems to be running fine so far. I haven't seen any problems. I thought there might be I leak on the valve cover so we put a new gasket on it. But there was it looks like a leak at some time. But even if there was a leak would it be at 0?

99% chance its the sending unit. They are a common problem.

Your truck would sound like a lawn mower if it truely had zero oil pressure. It would NOT sound normal whatsoever.

it is most likely the sending unit that is bad i had to replace my cause it was doing the same thing

Ok thank you guys. Do you know of a price? How hard it would be to replace? And where I might be able to find it?

I just had this problem. First I knocked the wires out of the oil pressure sending unit while changing the oil filter. Two little prongs that gave me heck getting them back in.

Then my pressure went up to 80...sigh...so I got an oil pressure sending unit at Advance for around 30 bucks and replaced it. Then, I had to catch heck again getting the little prongs back in, but it was a cheap fix anyway.

Verify connector/wiring first, but probably the sending unit.

I buy these directly from Jeep for best reliability/accuracy/mating with your factory gauge. Worth the extra $20.