l appreciate many of you know this but i thought i would put it down in one post for the very new arrivals.

When you first wake up the beast there are the usual well documented suspects to take care off; plugs, HT leads, inj hoses, inj clean, fuel filter, probably the fuel pump etc etc etc. While you are doing this it will require removing of the injector plugs and moving the injector loom, despite how gentle you are you will have to move these wires to some extent.

Today i installed my new injector loom and while removing parts of the old loom i was not particularly delicate with it, what astounded me was that even though the tops of the loom where pliable the bottoms where the spurs meet the main loom in the bottom of the valley of doom literally shattered, there is no other word for it, ive never seen wiring do this in 40 years of dicking around with many old cars and bikes. A piece 1'' long had less than 1/8" of flex before it snapped, and this is the stuff near the front, the further in you get the worse it gets, its quite simply caramelized. What really amazed me was that it ran at all as there was evidence that parts of wire had been missing insulation in parts for quite some time.

So, its of my opinion that if you are taking on one of these beasts you should vector in the cost of a new injector harness in with the usual wake up items right off the bat, its a quintessential; abet spendy ''while im there'' item.

.....................................as for me, its just strengthened my resolve that least all the wiring forward of the firewall should be replaced. Having had a poke around on here https://www.autosparks.co.uk/finder its not ''that'' bad $$ .....................................

As always, with all my Jag victory's there is thanks in part to the usual stalwarts Grant, Greg, Doug et al. Thanks Gents.

Cheers AOI

 

AOI,

I echo your view on the fragility of ageing injector wiring. My 79 pre-HE is in really pretty condition but, as per my current 3D's thread, the brittleness of the 40 year old injector wiring its a miracle that it runs at all!

I'd strongly suggest that any stripdown of a 25+ year old V12 XJS should include a replacement of the injector wiring loom.

Paul

 

And also, for all the above reasons in this thread, it is a very good mod to tie the loom to the rails, rather than to the floor of the valley of death.