The deteriorating heat exchanger looks like it may be the air conditioning condenser? I don't believe the normally-aspirated cars had an engine oil cooler (the cooler pipes are bypassed at the oil filter housing), and I seem to recall that the transmission and power steering fluid coolers are built in to the radiator.

I don't know what the electrical connector is for, but you should be able to identify it in the wiring schematics by its location and wire colors. I'd guess windshield washer pump, fog lamp, side marker lamp, etc. You can download the schematics here:

Jaguar X300 Electrical Guide 1995

Cheers,

Don

 

i’d recommend throwing parts at this problem,

coil packs and TPS both have very weird failure modes. don’t forget about fuel supply either

 

Don is correct, that messy thing is the Air Con Condenser. There is no oil cooler on your car and the By-Pass is factory fitted.

The electrical connector is for cars with Headlamp washers - there is an extra pump in the washer bottle in that case, but if you don't have them the connector is spare.

 

Vee,
The TPS for the XJS is not the same one as for the X300. The XJS is DBC 2626/2889 and the X300 is JLM12074

Simon,
A smear of sealant should probably do the trick, as the other 3 bolts should be enough. As the throttle body is relatively easily removed on the N/A cars, it is certainly worth a try.

 

The TPS for the 1995 and 1996 XJS, with the 4.0 AJ16 engine is indeed JLM12074. I've bought one, from Jaguar, and installed it.

I've also gone through two of these cars, thoroughly cleaning both throttle bodies and can confirm, they are one and the same.

You can try to live with three bolts, and if your problem is solved fixing the other gaps, then you are good to go....however....if it isn't quite resolved, you will have to address it before moving on, otherwise you might be chasing ghosts.

Ideally you could buy a piece of rubber and cut your own gasket, but perhaps you can skip that and just use a fuel resistant dressing. I would use the Permatex Permashield for this use. It's fuel resistant. (#85420) Its stays tacky and is easy to work with. If not, then just go with a gasket maker like Ultra Black. That would give you a thicker material to work with and provide a bond that is less prone to failure, but also more difficult to remove in the future.

The way this engine is designed you will have to go back in there someday to clean it out in the future.

 

Vee,
My mistake. I dont own an XJS, but had looked up Jaguar classic parts to check. I was looking at the AJ6 4.0 litre rather than the AJ16. My apologies.

The reason that I looked on Jaguar Classic in the first place was not to broaden my understanding of matters XJS related, but following up your comment about the Ford logo being stamped on the OEM TPS. It was my recollection that there was no such stamping. That was certainly the case with my car, coincidentally also of 1996 manufacture, and the absence of any definitive stampings is what seems to have kept the issue alive, as owners have balked at the thought of paying around £200 for a sensor which for sure would have cost a fraction of that to produce, and which might be available from Ford for a more reasonable price.
Logic would suggest that the Ford parts bin would have been a source for the TPS, but it was also the case that Ford were trying to be discrete about the extent of their input to the X300 lest the Jaguar brand be diminished by association. The only component I have come across which bears a Ford logo is the airbag module, but being behind the glovebox, not too many customers would likely have been put off! I would be interested to know whether anyone can expand the list of Ford branded components.
In any event, your Ford stamped TPS, if you still have it, could be very helpful in trying to finally run this subject to ground and hopefully provide a less expensive solution to a common problem. For my own part, I coughed up for the "OEM" new sensor, but as you can tell, havent quite got over it yet!

 

countyjag,

It's likely that the TPS you removed initially, without the Ford logo was not the original then!

I think it's time to get over it. There is no substitute. There is no car that used the same part. There are threads that go into deep dives, and I've spent hours trying to find the same Ford part without any hint of success. As strange as it sounds, that TPS is a part that serves the AJ16 engine, and nothing else.

I still have the original part. If you want to see it, I can pull it out, take some pics and let you have at it as well?

 

This may help or may not but I’ve been having an intermittent stalling issue for the last few months and think I’ve found it ,also accompanied by a drop in fuel economy of a good 25 per cent !!

I had a wire in my injector loom trapped between the plastic loom cover and the metal base plate ,this was so tightly clamped between the two that the insulation was very slightly damaged and shorting out the injector !

as soon as I removed that cover with the engine running it stalled ....I wrapped some insulation tape round the wire and fitted it back where it should have been and took her on my usual fuel fill route and mileage increased by 6mpg on that run and didn’t stall once ..worth a look