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On Saturday I noticed my HCV leaking again (I replaced it a few months ago) , now today I smelled coolant in the cab and coolant was leaking onto the passenger side floor board. After a while it stopped leaking. If I turn the heat off on the blend door, will that stop the coolant from flowing...

Has anyone else experienced a coolant leak on the front passenger side? I don't see much missing from the reservoir but the leaks increase when I fill it up. It leaks less when the reservoir is less full.

1996 XJ 2WD 4.0 engine with 235k miles on it. Well, I got one problem solved (flex plate), then another problem solved (water pump and AC compressor), and now I have another problem. Here's the problem: I was driving down the highway and the Jeep almost cut out on me, I pulled over to the...

I had my flexplate replaced this afternoon, so far so good but when I looked at my temperature gauge it remained pegged to the left under 100. When I hooked my scanner up the temperature ranged between 167 and 1 or 2 degrees more or less. I'm thinking that the CTSU got loose or may be broken...

I'm going to get my flex-plate replaced or have the bolts tightened on Wednesday. What else should I have done if they decide to replace and not repair my flex-plate? If I have a leaking rear main seal is this the time to do it? What about the CPS? Or should I leave just well enough alone and...

I was driving my 1996 4.0 2WD this afternoon and I started to see my voltage creep up past 14 volts and it slowly went on it's way to maybe 15 volts. My GEN light went on but I kept driving. I picked up my wife and we started driving back home and the volts went back to 14 (it usually hovers...

Subject: 1996 XJ 4.0 I have seen a few threads talking about capping off the vacuum line to the heater control valve. What happens if you don't cap the vacuum line off? The new heater control valve that I bought from Autozone, doesn't seem to have a good fit to the vacuum hose, it's a...

I left the lights on and the battery died. When I got a jump it started and died, I had to keep my foot on the gas or it would stall. After a few times it didn't need my foot on the gas and it went back to normal and started without my foot on the gas and idled like normal. After I got home I...

I've looked around for a write up, but I can't find the one for my year (1996). I have a few questions; the nut that hold the ground strap to the chassis is hard to take off. Is there another step that I am missing? It looks like it's a metal screw. It's stuck so hard that I flexed the firewall...

I went to the store today and came out to start my rig up and it didn't start. Here are the symptoms: Turned key and starter doesn't engage. Tried the "NSS fix" by putting it in neutral,etc....no start. The key turned further than it usually does to get to the "run position". For example; the...

Has anyone experienced this issue? I can run the Jeep for hours and it's fine. If I stop to get gas(2 minutes0 or go shopping in a store (15 minutes), it's fine. But if i go home hang out for a little over 15 minutes or so and get in the Jeep and start it's fine, but it will sometimes hesitate...

My new dog broke my damn third brake light. He just snapped it somehow, so I went to the JY and got a new one. Unscrewing the two screws is really easy, the problem I have is disconnecting that damn harness that goes from the lift gate to the Third brake light. Can someone please tell me how to...

I have the NAPA ZJ fan clutch, I installed it approx 3 months ago. Here's the intermittent issue I have just recently noticed during cold starts. It seems that it doesn't engage when I first pull out of my driveway and then it engages about 100 feet down the road as the engine temperature rises...

Yeah, it's easy to look up the "P0 codes". But what about the "live data" stats? How do I know what the correct "Absolute Throttle Position", "Ignition Advance", MAP, etc. stats are while at idle? I've searched here, is there a source that anyone can recommend? Here are some photos of what I am...

This is for a 1996 XJ 4.0 It's pretty minor now and I want to nip it in the bud while I still can if possible. Here's the problem; I originally thought it was that little hose that goes to the overflow tank and it actually was the little hose, so I put a clamp on it and it stopped that leak. I...

I was showing my friend my water pump and Napa ZJ fan clutch on my 1996 XJ 4.0 4/96 "build date", and I started looking around towards the back of the engine on the driver's side, near the CPS connection and I think cylinder 6. There's a braided ground strap that seems to be connected to the...

What are people's experience with this mod? I just installed one three days ago along with a new water pump. Here are my observations: Pro's: GREAT cooling. I feel like I can let it idle all day and not go past the 210 point. Cons: It's loud. Does the sound calm down after a few hundred...

First problem: When I am driving down the highway and take my foot off of the gas pedal and coast, I hear a sound from the rear differential. It sounds like some trucks when they coast. Second problem: It's related to the above, when I take my foot off of the gas pedal, it feels like it...

Yesterday morning when I started my XJ, I heard a strange noise while doing my daily check on the vehicle (signal light, brake lights, and tire inspection), so I opened the hood and kind of narrowed it down to possible the AC compressor. The sound is similar to a quiet "siren" of sorts. I drove...

I have a 1996 XJ 4.0 Here are my symptoms: When cruising down the highway @50-60mph, I take my foot off of the gas pedal and am ready to brake, the transmission seems to downshift like I was in a standard shift and went from 5th to 4th gear. If I ease my foot off of the gas pedal, most times it...