ps--you might have to use a blow-drier and an infrared temperature reader on the front coil to verify that the clutch isn't engaging at the proper temperature

 

I feel like I'm over thinking this...

Turn key to ACC, gauges work
RUN: One single loud click

So relay is working. I think starter.

Tap on the starter a few times
Turn key to ACC, no response
Jiggle positive battery cable, gauges work
Hold terminal in place and turn to RUN
One single loud click

Bad terminal/cable, right? I know the clamp has seen better days, and it's unlikely that the terminal and starter developed problems at the same time

 

My jeep was just doing that. I'd get new clamps, and cut the wire back if you can. My battery wasn't the best either, but I don't think it was the problem.

I had power until i went to go to start it and then it'd click and go dark.

 

I don't know about Why Jayz but XJs have one starting relay in the cab Junction Block, which fires a starting relay in the PDC, which trips the solenoid, which powers the starter lol.

But yes probably cable/connection.

 

Bad cable clamp, as expected. Replaced it after I managed to get it started for a run to the parts store. Seems better now

 

Clean the wire up a little too while it was off? Or cut the wire and use a new point of contact?

 

Option 2. It was a sealed unit, and I replaced it with a clamp-down style til I can get a new set of proper cables

 

What parts are guys going OEM for the cooling system? Trying to save a few bucks where I can without having it blow up overheating.

 

Ahh okay. I need to redo my cables. Just gonna wait until i relocate my battery to the driver side where the airbox is.

 

Are you asking which parts should be OEM and which should be aftermarket?
If so, you can stick with OEM parts for everything. Cooling parts do wear out eventually, and they just need to be replaced when that time comes. There are two major changes that I recommend making:
1) Get rid of your heater control valve (if you have one). Copy the design from the last couple years of XJ production.
2) Use a ZJ fan clutch instead of an XJ clutch. It pushes more CFM of air. NAPA p/n 272310

 

i recently had to replace my o2 sensor after the cat because the wires got ripped off. im looking to get better mpg from my jeep. i ordered a spectre air filter. which o2 sensor should i replace next to get the greatest increase?

 

the upstream one

 

Yeah I was wondering if anything is something I should go MOPAR for, ie the way I did for my TPS sensor. Otherwise, is Napa sufficient? I'd rather not spend $400 on mopar parts for the cooling system, ha ha. I remember seeing the MOPAR t-stat being important.

Edit: And 4.0 uses a reverse or a standard rotation Water pump?

 

I've run a stant tstat before with no problems but recently I was doing engine work and it was a good time to update some things pertaining to cooling system since I was also doing a flush. Went with the mopar stat based on recommendations I've read from the reliable posters I've seen on the forum. No issues so far.

 

52028186 stat from the dealer. I learned my lesson after purchasing 3 Stants, warranting them with crappy results, and then deciding on the factory stats with excellent results.