NPC: strange oil-pressure *problem*, on my Jeep ... Options

[SirAndy]

so, driving my '93 Jeep Wrangler i noticed lately that the oil-pressure goes up to max. when the car gets *low* on oil ...
(IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif)

anyone care to explain?

the car has the 4.0L straight 6, called "High Output" (whatever that means) ...
hauls ass (for a jeep) ...
never had any trouble with the oil pressure, always used to be around the center on the gauge when filled up nicely.
but lately, when the car gets low on oil, the pressure goes to max. on the gauge until i fill her up with oil again, then the pressure drops to normal.

this is kind of counter-intuitive. shouldn't the oil-pressure *drop* when low on oil ???

what am i missing here?
(IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) Andy

[scotty b]

QUOTE (SirAndy @ Jun 9 2005, 03:10 PM)

QUOTE (bd1308 @ Jun 9 2005, 03:29 PM) Instrumentation.....seriously. as i said, no electrical problems with the car. ever. all gauges work. always. heater works. AC works. light works. never had any trouble with the electrical ... assuming the gauge works just fine, what could cause the oil-pressure to *rise* when the car gets low on oil ???? (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) Andy

Have you changed the sending unit? Or the gauge? My guess is a bad resistor on the gauge, or the sending unit itself is bad. If you normally read around 40 lbs, that is typically in the middle of the gauge thus sending the needle north when the pressure drops.If you in fact for some reason had an increase in pressure the needle would go down, but since you don't have sudden increases in pressure you haven't seen it drop. Now onto the bridge I have for sale (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)