I'm looking at buying a 1996 XJR. I have 3 candidates, and need to decide soon. The best candidate has it all except Cruise Control. Is that a doable fix for a DIY? or does it involve getting deep into computers etc?
Thanks

 

To obtain the rubber diaphragm that moves the throttle may be hard to find and how long will it last

The cruise control works on it's own vacuum pump , vacuum dump valve and the CC module behind dash , gets a speed signal from the ABS module / left rear speed sensor

 

Retrofitting cruise is an easy job and you can get a whole kit for it, they show on eBay every now and then or you could get all parts from a donor car. I'm sure there's a detailed how to somewhere on this forum, might be even mine.