Purplemoneypit

Hey everyone, per the usual, I could not find my specific issue after much grinding and gnashing of teeth and Googling. I'm buttoning up the engine bay after dropping in my overhauled 4.0, and I cannot figure out the oil pressure sending unit rail thingy... Everything I find online only shows the one oil pressure sending unit threading directly into that large bolt that goes above the oil filter mount. Attached here is everything else that I THINK goes with it? I cant find the wire with the correct end that fits the skinnier sensor... I am at a loss here. Help!!!

Edit: I think my XJ is a 1990, could possibly be a 1991. Lol. I wlll be double checking and updating. I think if its a '90 that makes it Renix? This is my first heep and first experience getting this elbows deep in a vehicle, so apologies for noobishness.

Garrett S.

Is it possible that the smaller one was an aftermarket sensor somone put in? it dosent look familiar to me but I dont work with renix much.

Purplemoneypit

I'm wondering if that's the case? There's actually several connectors and other pieces of wiring that are just... hanging out in the engine bay. If it helps at all, the side of that oil rail thing has "HD USI" stamped on it, repeating down the entire length of the rail.

Garrett S.

Are there any aftermarket gauges in the jeep?

DFlintstone

Renix has three bolts holding the throttle body, 91 on has 4. That smaller deal looks like the gauge or light sender for the temp. Goes in the top left rear of the head up to 95 or so. 97 on has something in the T-stat housing for that. For oil pressure just screw the big one in that hole. There should be a loose wire connector near the back of the head for the little temp sender.