For starters, I am completely new to jaguars. I have 2 questions.
1. Where is the tank selector switch on a 1988 XJS?
2. Has anyone done a fuel cell swap on these and where did you find the fuel cell?

 

Welcome to the forums Huff2679,

I've moved your question from General Tech Help to XJS forum. Members here with the same model will be able to help.

Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some information about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham

 

Well, the XJ-S only has one fuel tank, so there is no tank selector switch. The XJ-6 and XJ-12 sedans had two tanks, I think the switch is in the center console, but its been a long time since I looked at one.

I have seen fuel cell conversions, I imagine they came from the standard performance part suppliers; Summit Racing, Jegs, etc. but I haven't investigated it too much as to what is best.

What is wrong with your tank?

 

I don't have that model but I think the H&E convertibles had two tanks, don't know about the selector or how the system works.

 

Are the V12 XJS and the XJ-12 the same car?

It is a customer's car, hence why I am completely new to Jags. The tank has the same common problem that I keep seeing pop up on here. Water in the tank. I am trying to figure out if it is cheaper and more reliable to install a fuel cell as compared to fixing the tanks that are there.

I will have to check on jegs and summit. Thanks for the suggestions!

 

Different cars.

The XJ12 is a 4 door sedan. The XJS is a 2 door, either fixed roof or soft roof.

Cheers
DD

 

Ok. Thanks for the clarification. I am certainly confused by this fuel system. I am trying to gather as much information and knowledge as I can before I actually dive into it.

 

So....what car do you have ?

Cheers
DD

 

It's an '88 XJSC.

 

An XJSC is an XJS but fitted with the cabriolet roof structure. The fuel system is standard XJS:
Main tank feeds
sump tank under battery (it has a filter inside accessible by removing the locking ring (remove metal cover to access) feeds
fuel pump (also under the metal cover) feeds
fuel filter (behind spare wheel) feeds
fuel rail via under car pipe feeds
return to tank via under car pipe.

There are two FPRs, the one on the rail supply side (RHS of engine called A bank) can be removed as it does not so anything. The one on the LHS, just downstream of the fuel rail, controls pressure.

 

Jaguar specifications always have significant changes over the production cycle but the XJS, with more than twenty years in production, has more than most. As can be seen from JEPC (Jaguar Electronic Parts Catalogue), the fuel tank alone has many differences depending on VIN:





As there already appears to be some uncertainly about the likely specification of the vehicle you have in for repair, posting the VIN could be useful.

Graham

 

If it's a 1988 car and the rear badge says "XJ-SC" then it's a "Cabriolet" with rigid rear side window frames and a permanent T-bar roof.
If the rear badge says "XJ-S" then it will be a "Convertible" (or Coupe)

As mentioned, all XJSs have one fuel tank. A 1988 car will have a swirl pot under the fuel tank in the boot (trunk).

Perhaps post some pictures here and members may be able to give some advice.

Good luck

Paul

 

OK, since we know it's an XJS and not an XJ12.....

To help you learn the lay of the land, here's the sump tank and fuel tank


Cheers
DD

 

I didn't even think to include the VIN in my original post. I see that several people have suggested that would help.

It is: SAJNV5842JC144548

Thank you all for the help and suggestions! This is going to be quite the learning experience for me! I'll get some pics of the car later today.

 

Where are you located in Virginia?

There are several on here from various parts of the state that may be able to assist.

 

Staunton area.

 

That VIN implies it's not a Cabriolet or a Convertible, and is not referred to as an "XJSC".

It's a V12 XJ-S and is a Coupe in case you need to look for fuel tank parts.

Cheers

Paul

 

It is definitely a convertible.

 

Looks like a coupe that was converted into a convertible, IMO

Cheers
DD

 

That is completely possible. I am not sure of the history.