Hello everyone! I am the new owner of a 1988 XJS H&E convertible.
the car physically is in great shape as it is a born and raised Arizona car and has not been driven since 1999 (36,000 miles).
I am working my way thru the fuel system and should have everything cleaned and renewed by the end of next week. A pain in the @$$ but still an orderly project.
What will be my next chapter is the vacuum lines. I have the manuals (Service, ROM's, etc) but cannot find complete vacuum diagram. just basically the emissions pertaining to the timing, etc. I have about two miles of brittle, broken, disconnected vacuum hoses to replace. Can anyone point me in a good direction for a good overview of the complete vacuum system?
Thanks!!

 

My working for vac hoses is ONE hose at a time.

I doubt there is a "one size fits all" layout for the V12 cars.

We got next to nothing, you guys got stuff nightmares are made of.

Some/most have eliminated things as they go, due to inoperation, and parts to make it so being NLA (No Longer Available).

I think Doug has the best solution for your market, and will probably slide in when he catches up.

 

I did mine not long ago, but I have an 84. not sure if there is much differance, I will go thru my files and see what I have on the vacuum line, give me a couple of days and will post them here and you see if they will work for you

 

Here are the ones I have, they are also located in my profile area in the albums. Hope these work for you

 

Woweeee!!!!


Makes the 8 plug Ranger look simple!!!!!


But, definitely a very nice car, well worth the effort
Carl

 

actually it is a simle matter of breaking tgings down into smaller chucks, work each secion at a time

 

I am learning that quickly about P.O.'s removing things when they cannot be replaced. I even found a 2 foot length of vacuum line with a lawn mower fuel filter on it not connected to anything, but under the hood. It's cool though... I love the challenge!

 

Thanks for the drawings DAVERB! two I have not seen so this is a gold mine!!

 

I dunno JAGCAD.. My Dico2 I was a mess under the hood, too. I like working on this XJS.. probably because it is much lower! :-)

 

That hose and filter are an official Jaguar part.

It is part of the distributor cap breathing system, so keep it safe until you get to that section.

 

Serious? well, that makes me feel better about the previous owner then... thanks for the tip on that. it was in that area!

 

The dizzy ventilation system is to prevent the build up of combustible vapours in the dizzy. You should find a tube exiting the top of the cap and joining the air intake system on B bank in the hose leading to the Auxiliary Air Valve. If you have not already done so, I suggest you rad the book by the Great Palm, downloadable free on JagLovers.

 

just downloaded...thanks again!

 

I replaced all my vacuum hose/lines with silicon vacuum line, attached is the ones I bought (don't think the same seller) I also put a link in for the EBay page so you can see other choices in color and such, and there is various clamps for sale. I should have picture from when I did some things under the hood/bonnet in my profile album section

10FT Length ID:8mm (5/16"") Blue Vacuum Silicone Hose Racing line Pipe Tube | eBay

https://www.ebay.com/sch/i.html?_fro...+line&_sacat=0

 

Hello all,
its been a while and I have almost completed my under-the-hood work. The more I tore the engine bay down, the more I found wrong. As mentioned earlier in this thread, the car has sat since 1998-1999. Once I got the intakes off, I found that sometime in the cars (stored) past some small furry woodland creatures moved in. Pretty hard to replace different lines and hoses when they are not there anymore...and lets not mention how good electrical harnesses taste to these little rodents.
Anyway, I found this photo I took during the preliminary tear-down phase. I guess it was better that the rodents ate most of the evidence from previous "mechanics"
Can you spot the issue?

 

Is that a vac line attached to the throttle rod bit?

 

You are right! Got a good laugh at first, but realized that this might not be the only issue... Fortunately I did not find any other existing error. Just a lot of chewed up stuff.

 

I once worked on an car with a mysterious climate control problem.

Long story short.....

A key part of the system was a rotary vacuum valve with (what appeared to be) nine vacuum nipples.Except there were actually only seven functioning nipples. Two were false nipples....never drilled. The same basic switch was used in various cars....in some cases with seven functional nipples; in other cases, nine.

A previous mechanic or owner had slipped a vacuum hose onto one of the false nipples

Cheers
DD