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Well, that's that one eliminated. I have checked the fuel pressure as per the manual and the readings are just about what the book says +/- 1 psi. I listened to the injectors and they all sounded about the same. I tried to time any tickover speed changes that might be caused by the change...

Not much progress today but I have discovered that Stanley Electrical Co. Ltd is nothing to do with Stanley tools apart from being what they call a licensed partner. Stanley Electrical started 100 years ago in Japan and seems to be a huge worldwide company, although I have never come across...

I've followed the link above and from what I can make out is that even the Wrangler fraternity were struggling with this thing. Mine definitely has no connection to any speaker or buzzer, I don't even have the little speaker. The chime module in mine,which is velcro'd to the fuse box goes...

Here is the plan for the new cat and 'couple..I have welded an M18 boss into the outlet end of the new cat , then there is a reducing bush from M18 to 1/4NPT, then a nut and olive fitting for the K type thermocouple. I have now got the braided cable through to the inside of the car using...

My experience so far seems to indicate that the car operates quite well since I broke the thermocouple. I also managed to find the one on a Jap auction site, Pace Auctions, but access has been restricted since 2022. It was only a picture though. I am chasing this in the hope it might be...

Sadly my Jeep does not have an OBD socket. It relies on you counting flashes on the check engine light. It's pre OBD 1 I have accessed the box where the thermocouple connects way up on the bracket for the brake pedal. It is a Stanley DVO75-41070. I can't find any info on the net. That is...

I've got it booked in to change the cat. I have decided I'm too old to be grovelling around on a hard floor. Between now and then I'll change out the thermocouple for a new one I got a while back, but I have no idea if it's the right one. I just got the most common type in the hope it works...

I did a run of about 10 miles today down the back roads and could not feel the slightest bit of difference from what it was like with an unbroken thermocouple. Now I'm wondering if has ever worked and just what it does. The mystery just gets deeper. I'm going to change the cat and see what...

Wow, that is a good check list, thanks. I can tick most of the suggestions as done. ✔️ I have just changed the sensor for the recommended NTK one. There is no downstream sensor, that's where the mystery thermocouple lives which I broke today trying to get out. Since no one has ever been able...

I fitted the new O2 sensor and put the car back in for the test. That means all the sensors will have been changed. Sadly it failed again due to high CO. My next move is to fit a new cat that I have had in stock for a while. If it fails again I shall be out of ideas what to try next. I think...

It looks like I'll have to take it off the car since it is well boxed in. That's a next week job though. Keep you posted. I'll try the picture again but don't be surprised it it doesn't show.

I have tried several times to put up a picture of the ECU label but the system won't take it. It's just a regular jpeg. The Chrysler number I would like to find is 56028044 5602 8044. So far I haven't been able to find one and the rebuild people mentioned above don't do anything pre 1996...

In my quest to get information about my 1994 XJ 4.0, Jeep themselves have offered the following information. What follows is a cut and paste from their email. 723 Safety Defect/Non Compliance Description and Safety Risk: THE FRAME MAY CRACK AND CAUSE THE STEERING GEAR TO SEPARATE FROM THE...

I am now actively searching for a replacement ECU.. Posting on a few parts recyclers sites have not brought any to light. I have attached a pic of the label on the side of my unit. Can anyone advise if this number is one that has been seen on any other vehicles. My XJs were originally...

Thanks for the info. There are a number of differences in the RHD version but I have worked my way through all the tests you mentioned as far as possible. My temp sensor is a thermistor not a thermostat as in the diagram so it changes resistance with temp, it is not an on/off action. I checked...

Thanks again for the interest. Unfortunately I can't check whether the aux. fan comes on with the aircon as it looses its gas due to a leak somewhere so the pressure switch shuts it down. It works if you bypass the fan relay, so it's electrically sound. For some reason the ECU is not...

Thanks again for the interest. Unfortunately I can't check whether the aux. fan comes on with the aircon as it looses its gas due to a leak somewhere so the pressure switch shuts it down. It works if you bypass the fan relay, so it's electrically sound. For some reason the ECU is not...

Thanks again for the replies. I was not sure about the thread tape on the new sender so I did a continuity test on it and it was connecting with the head. I guess the thread cuts through the tape when you tighten it. I have tested the relay off the car as well as swapping a couple of them. No...

Until the fuses went in the meter I had no idea there were any inside. I have got some new ones now. Re the sensors, I have renewed the one in the thermostat housing (see pic) and have looked all over the radiator and head and can't see anything else that looks like a thermostat/sensor. Mine is...

Many thanks for the IOD definition. I blew the fuses in my meter when I put it in line with the neg terminal so I put a small bulb in series with the lead and sure enough it glowed. I opened the door and it immediately went bright. Next I started pulling the fuses to see what turned it off...