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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...

This is beginning to get expensive. I have a new battery (probably not connected to this issue) and numerous new engine sensors and I have just fitted a new MAP Sensor. Now the battery is flat again. There is something draining the battery while the car is stood. Oddly enough I can't pick...

I have actually found the complete (I think) set of genuine Jeep wiring diagrams and the workshop manual. Each section is a separate pdf, 41 sections in all. It's a big document, 92 MB. I have worked my way through some of the individual pages of the wiring diagrams but haven't found out if...

Hi all, I have been progressing through all the sensors. I have ordered a new MAP sensor as it did not seem to work when I put vacuum on it. Unfortunately that is now lost between here and Germany. I now have yet another problem. The (brand new) battery was totally flat yesterday. Checking...

Got a problem using quick reply. It won't go, so it's on here as well. I did try to unscrew it but gave up as it just would not move even after soaking with diesel for a couple of days and applying heat. If I destroyed it I doubt I could get another. So I chickened out. I might have a...

I have been looking into all the other sensors. I have got a new water temp one on order as the car boiled up just after the test so I'm assuming the one on the thermostat housing is the culprit. I have also been looking at the temperature sensor on the cat that could be an oxygen sensor but...

I have never seen an OBD plug on my Jeep but I'll have a look tomorrow. I thought it was too early (1994) for that. I have always used the flashing check engine light to get the codes. I have been working my way through the sensors trying to find something dodgy, but no luck so far. The...

You are following my thought process. As far as I know the Lambda (O2) sensor has never been changed. There is only one, in the exhaust downpipe. I was already considering changing it as that seems to be the most likely culprit. I hope I can get one locally, but Spain is not very good in the...

Here is my latest update. IT FAILED THE TEST. Lots of thoughts as to why. Did I not put enough Alcohol in the tank, has something else gone wrong? The result was quite a bit worse than last year. Here are the figures. Pass figure is 0.3% CO. Last year's result 0.29% CO. This year's...

Thanks everyone for all the suggestions. The alcohol is going into the tank today and I'll go for a run to see if there is any difference. I have done a test with my gas tester and will do another when the alcohol has had a chance to get round the system. It won't be as accurate as the test...

Many thanks for the info. I have found out where I can get it here in Spain. It seems supermarkets are the places to look. Its called alcohol isopropilico. So I'm off out this morning to get a gallon. The test is not due for 3 weeks so I'll add it to the tank a few days before the test. I...

I forgot to ask. How much rubbing alcohol do you add to a gallon of petrol? (gas)

Rubbing alcohol threw me a bit because of the different terminology on this side of the pond. We call it surgical spirit or Isopropyl Alcohol. Google says it's used for cleaning but I have never come across it being used as a cleaner in the UK. I have now got to try to find a supply of it here...

Many thanks for the reply. Yes, I did the conversion myself. It has two 60lit tanks in the back and is a system made by Tartarini, it's a Tech 97. Tartarini are one of the biggest manufacturers of LPG equipment around and many other manufacturers are Italy based. The system is not multi...