'91xj6 oil pressure guage goes up and down...it runs smooth (no noise)??

 

So long as the oil level is good, and it is not radically contaminated, the most likely cause for your gauge fluctuation is a faulty oil pressure transmitter. The gauge is reading inaccurately as a result, and the engine is fine.

The transmitter is not in an easy place to get to, and there are several options of new transmitters to install to solve the problem. If you need more information, go to the XJ40 forum and post another question there.

This section is for posting coments about the site's administrative operation, like "how come we don't get to see a wet T shirt shot of the girl in JimC64's signature line?"

 

Hey JagTech,for the sake of your (humor) post I copied this original post into the XJ40 Forum lol