oil pressure

Here's the deal

I had my oil changed and Jiffy Lube (moble 1 as always) two weeks have gone by and my Girlfriend has been driving my jeep all that time. I just drove it today and I noticed that the oil pressure was spiking at 80. I freaked to put it mildly. I pulled over and checked the oil level and it looked high ( could it be that I was driving it) I drove home very carefully and parked it. I started it up again and it still showed a high level on the dip stick. Do I have too much oil in my engine? Is this was is causeing my high reading. Or am I about to be seriously screwed?

Thanks
Adam

XJadam said:

Here's the deal

I had my oil changed and Jiffy Lube (moble 1 as always) two weeks have gone by and my Girlfriend has been driving my jeep all that time. I just drove it today and I noticed that the oil pressure was spiking at 80.

Click to expand...

What year is your XJ? My 2000 (and past 2001) does this occasionally; in both cases, it's down to a failing oil pressure sensor. If it's not blowing oil out past the gaskets or making horrible grinding noises, chances are you're in the same boat.

If the gauge is working, but running high, suspect a glitchy sender. If the gauge is pinned as soon as you turn the key (and it's a 92 or newer), the sender is probably disconnected.

I have a 99, it is not spraying oil everywhere so I guessing it is a bad sender. So how do I fix it?

XJadam said:

I have a 99, it is not spraying oil everywhere so I guessing it is a bad sender. So how do I fix it?

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I forget which way it works, if the sender plug is disconnected I don't remember if it reads -0- or -max-, check the plug first, it's right next to the oil filter, black tubular thing with a plug on the end. Unplug it and plug it back in or if its been knocked off plug it back in. Otherwise just pick up a new one and unscrew the old one and screw the new one in.