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My 2000XJ started running funny; down a little on power, and a new engine noise. My scanner indicated an ignition problem with #1 cylinder. I pulled the valve cover and looked at the valve train and #1 inlet rockerarm was very loose. My initial assessment was either the lifter collapsed, or...

Recently blew a badly rusted steel brake line. Replaced all the steel brake lines(10 pieces) with stainless steel brake lines from InLine Tube (nice quality!) and also replaced the rear wheel cylinders. After reading several manuals, including FSM, my son and I can't get brake fluid to the...

I found no o-rings on my evaporator-to-expansion valve connections. Could not find any info on this. Is this a metal-to-metal seal or an o-ring seal? Best regards, CJR

I'm replacing my rear 88XJ springs. Got one side done, but the passenger-side front eye bolt is not coming out and the nut is just turning. One of my manuals shows a replaceable "bracket" for the front leaf spring eye, So I assume this replaceable bracket has the nut welded on to, it for the...

In you Renix ECU upgrade video, two Renix ECUs are shown; i.e. 428 & 429. In the replies to that video, it's stated that the ECU 428 was used because the XJ used was an automatic. Is that correct? So then the Renix ECU 429 can only be used for stick-shifts? Best regards, CJR

I have seen two(2) different tooth/notch pattern on the Renix XJs that are used to generate the CPS voltage spikes. One flexplate pattern has three 120 degree sectors with three large notches separating each sector. Between the large notches are 20 small teeth. Supposedly, the ECU counts the...

I've been searching for the bolt specs for mounting the Crankshaft Position Sensor to the bell housing on a 00XJ. Here's what I've found: 1. Hex Bolt head size: 11mm 2. Bolt dia/thread: 1/4-10 or 7mm-? 3. Bolt length: 3/4" or 1" Does anyone know the Mopar Part no. for a set of these CKPS...

First let me say that Cruiser's Renix writeup is excellent. The other day my CPS wire got loose from the nylon ties and burned on the hot exhaust. I use High-Altitude CPS for my 88XJ(automatic) and tried to order another. They were out of stock and were twice as much as the standard CPS. So...

I just picked up a Putco 230004HW harness to use with my SilverStar sealed beams on my standard 88XJ. I got only hi or low beams, not quite sure which, so I need to electrically probe all the connections some more. I read that some H4 harnesses can be used with sealed beams. Also read its...

In my 88XJ, I had a broken female connector(i.e. half of the connector), in the fuse block, that holds the male spade leg of a fuse . This gave random connections to the instrument panel, My son and I wrestled with getting the female connector out of the fuse block. Then we took an unused...

We all know that if surface oxidized STRANDED copper wire is not cleaned right, solder won't stick/coat properly. So, I decided to start this thread to list all the possible ways of prepping older, surface oxidized STRANDED copper wire before soldering. Hopefully the best technique will emerge...

A few times recently I turned my ignition key to start and nothing. Moved my auto shift lever to check my NSS (cleaned & greased at 385,000mi rebuild) and still nothing. Swapped some relays around and still nothing. Then I noticed my ignition key lock cylinder was about 1/4" out from the...

My 88XJ runs well. I have redone my grounds with heavy stranded copper wire with copper ends instead of plated steel ends and have added extra grounds. Likewise, I've maintained clean terminals in my sensor connections and my firewall C101 connector with Deoxit and GB Oxgard. I'm now...

Jeep came out with a wiring harness upgrade kit, #83100066, to improve 87-90 XJ connections to the ECM. I did a search for this wiring harness upgrade kit and came up with zip. Anyone know of a good source (new/old JEEP OEM stock) that may still have this kit? Best regards, CJR

I need to replace some exterior lighting twist-type plastic bulb connectors (i.e. brake stop light, etc.) on my 88XJ. Does anyone know the part numbers for new suitable twist-type replacements, from NAPA, Autozone, Pepboys, etc, that I can use? With all the non-standard connectors, it's a PITA...

It's been mentioned here that Jeep used a lot of GM emission controls. Anyone know the part number/supplier for a EGR vacuum solenoid valve for this vehicle? Thanks in advance. CJR

I have a 88 Cherokee with AW4 and Command-Trac with a stock vacuum motor actuated front-disconect axle. I always stop to shift into 4WD and have never had any problems. However, I have read that Command-Trac can be shifted "on-the-fly". If the car is in 2WD, the front driveshaft is not...

Is there any trick to opening up a IAC? Or do you simply drill out the pins, take it apart to clean, and then simply use small screws to replace the pins when reassembling? Best regards, CJR

I'm considering all the options to change my rear drum brakes to disk brakes on my 88 XJ (i.e. disk brake kits, adapting disk brakes, replacing the Dana 35 rear axle with a 93 Grand Cherokee Dana 35 rear that already has disk brakes on it). Since the 88XJ has leaf springs and the 93 Grand...

I've been doing some work on my 88XJ 4.0L and discovered a frayed wire coming out of a wiring bundle under my intake manifold at about the level of the 02 sensor. The stranded wire appears to be stainless steel and shielded? Does anyone know what this wire is for? All my sensors are hooked up...