oil pressure guage

[4play]

My oil pressure guage will sometimes indicate good pressure (but it jumps). Once I start trying to drive, the guage always maxes out and lays flat, no movement.

From a search on the forums, I gather that a bad connection, especially in the ground, may be the culprit. Does this sound valid, or is it more likely a bad sending unit? Or some other problem I would prefer not thinking about?

 

Not sure if it would/should affect the guage reading, but the rear main is probably leaking. (I really need to pinpoint that leak.)

[Oizarod115]

from my experience when the sending unit goes bad oil goes everywhere, or it just doesnt work, both happened on my moms 95 XJ. with the not working coming before the explosion of oil.

 

i would imagine its that connection you mentioned?

good luck

-nick

[87manche]

the guage grounds through the sensor.

To test the guage pull the wire, it should peg, then grounf the wire to the block and it should go to 0. I'm guessing sender.

[Pete M]

Be very VERY careful if you remove the sender. I hear it's pretty easy to snap off the connection to the block.

[feerocknok]

Be very VERY careful if you remove the sender. I hear it's pretty easy to snap off the connection to the block.

 

I don't know about the 4.0l, but my 2.5l's came off easy sneezy.