Go Back  Jaguar Forums - Jaguar Enthusiasts Forum > Jaguar Models ( Classics ) > XJS ( X27 )
Reload this Page >

1985 XJS H.E. - Engine Compartment Mysteries

XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

1985 XJS H.E. - Engine Compartment Mysteries

 
  #1  
Old 04-08-2019, 10:19 AM
Junior Member
Thread Starter
Join Date: Mar 2019
Location: South Jordan, UT
Posts: 17
Received 6 Likes on 3 Posts
Default 1985 XJS H.E. - Engine Compartment Mysteries

Good Morning Gurus!

As I continue working my way from Boot to Bonnet restoring electrical functions I have found myself in the engine compartment and have a few questions about things I have found:

First, on the driver's side (LHD) we find this unit disconnected...


What is this and what should be connected to it?

Next, on the passenger side (LHD) we find an empty relay socket...


Missing Relay?

And finally, this bit of debauchery...



Sitting in a hole near the front of the passenger side air intake. Should it even be here? If so, should there be a rubber grommet in the hole to hold it tight?

Any and all responses are greatly appreciated!

Cheers,

DS
 
  #2  
Old 04-08-2019, 12:00 PM
Veteran Member
Join Date: Jan 2012
Location: France
Posts: 8,960
Received 4,471 Likes on 2,849 Posts
Default

I only know the third. It is a solenoid air valve that lets extra air into the inlet manifold when the airconditioning compressor kicks in. This is to prevent the car possibly stalling when stationary in traffic when the compressor starts up.

FWIW, the top one looks like an aftermarket non-factory item to me.
 
  #3  
Old 04-08-2019, 12:57 PM
Junior Member
Thread Starter
Join Date: Mar 2019
Location: South Jordan, UT
Posts: 17
Received 6 Likes on 3 Posts
Default

Originally Posted by Greg in France View Post
I only know the third. It is a solenoid air valve that lets extra air into the inlet manifold when the airconditioning compressor kicks in. This is to prevent the car possibly stalling when stationary in traffic when the compressor starts up.

FWIW, the top one looks like an aftermarket non-factory item to me.
Thank you, Greg! Is the solenoid in the correct location (air filter housing) and should it be secured with a rubber grommet?

DS
 
  #4  
Old 04-08-2019, 01:46 PM
Junior Member
Thread Starter
Join Date: Mar 2019
Location: South Jordan, UT
Posts: 17
Received 6 Likes on 3 Posts
Default

In other news, the orphaned part mounted to the left fender well turns out to be a 5 ohm ballast resistor. Anyone want to venture a guess as to why a PO would have had need for that in the engine compartment?

DS
 
  #5  
Old 04-08-2019, 02:00 PM
Senior Member
Join Date: Sep 2015
Location: Yorkshire U.K.
Posts: 697
Received 143 Likes on 115 Posts
Default

Originally Posted by Hobejam View Post
Thank you, Greg! Is the solenoid in the correct location (air filter housing) and should it be secured with a rubber grommet?

DS
yes grommet required
 
  #6  
Old 04-08-2019, 07:50 PM
Join Date: Feb 2010
Location: Adelaide Stralia
Posts: 19,423
Received 5,742 Likes on 4,121 Posts
Default

#1 is an aftermarket ballast, as you found, and the only reason I could imagine, is he had issues with the Ignition system, OR, he drank too much and fitted it to the wrong car, then forgot why, makes more senmse, as there is NOTHING in that HE that requires that thing.

#2 looks like the socket for the OE LH electric fan "diode pack relay". Most have been removed, and the LH electric fan wired direct to the A/C circuit. OR, that fan is playing up (common), so the quickest way to stop the gremlins, is to remove the relay that controls it.

#3 Explained, and depending on market, MAY be part of the original 15 timer fiasco, and again, most have been "de-timed", and that solenoid used for other things, as Greg explained.
 
The following 2 users liked this post by Grant Francis:
Greg in France (04-09-2019), orangeblossom (04-09-2019)
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Truck Graphics
XK8 / XKR ( X100 )
6
05-17-2017 07:51 PM
jakes jags
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
0
04-19-2017 11:41 AM
Doug
XJ XJ6 / XJR6 ( X300 )
31
10-04-2014 09:53 AM
BillDJohnson
XJ XJ8 / XJR ( X308 )
2
03-10-2014 12:53 PM
Rocky125
XK8 / XKR ( X100 )
12
06-27-2013 04:23 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Quick Reply: 1985 XJS H.E. - Engine Compartment Mysteries


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: