So after letting my 95 ZJ I6 sit for however long with no fuel pump and fuel filter, I finally got it all put back together and started it up. Well I looked under the hood cause it's got a slight Chatter to it. Anyways, I was looking around and noticed a pretty big puddle of oil under it, And traced it back to whatever the plug is that's right next to the oil filter, It has one wire coming out of it, Checked the oil and its like a quart over (Not my doing).

Anyways, I was wondering what that plug is and why would it be leaking oil out of it.

 

That is the oil pressure sending unit. Replace it with a Mopar sender.