96 GC V8 Limited. I was driving in stop and go traffic the other day, outside temprature was around 80 so I set my climate control to around 68. My "Check Gauges" light came on when I was at a stop sign. I looked and saw my oil pressure drop to zero. When I pressed on the gass pedal it went up to 20, and hovered around there. Normally I have seen it at 40.
It hasn't happend to me again, but have never seen that before. I am going to change the oil, and filter tonight, but aside from that, has anybody seen this happen?
OUCH I had a 96 GC. I had the same problem and it kept getting worse. Look into the valve cover where you add oil. You may see some sludge. If so your oil pump is getting cloged. I had changed my oil Countless times and never did solve the prob. I would be driving down the road and the pres. would just drop to zero. I changed the pump twice the sending unit once and ran a addition pres. gauge from the sending unit. I tired every engine flush and additive I could find and nothing worked. The Jeep ran for another year and actually was totaled. For some reason the 318 runs hot and if you dont use quality oil it can burn and sludge up. I used to have to shift into N running down the Highway and actually turn the engine off wait about 15 sec. and the restart the engine and then shift back into D to avoid the engine locking up from loss of oil. I would Def. try and flush the the motor as soon as possible hopefully you can catch it before it gets too bad.
I've never had my oil pressure drop to zero, but it does seem to fluctuate a great deal. The needle on the gauge seems to move around a lot; more than is common for other vehicles I've owned. It usually reads between 40 & 60 on the street, and 60 & 80 on the freeway. It has dropped as low as 25 before. Is a rapidly fluctuating oil pressure guage needle common on the 5.2?
1993 ZJ Limited 5.2 - no mods - Red with Gold (what were they thinking) trim.