XJ40 ( XJ81 ) 1986 - 1994

My New 1994 Xj40

Thread Tools
 
Search this Thread
 
Old May 2, 2021 | 10:39 AM
  #1  
TC Johnson's Avatar
Thread Starter
|
Member
Joined: Feb 2014
Posts: 76
Likes: 17
From: PA
Default My New 1994 Xj40

Greetings!

New to this group, but not new to the forum. Stumbled across a 1994 XJ6 near me with only 48k miles, and being sold by the family of the elderly second owner since 1997. PO had only put about 16k miles since his purchase, and had recently had it repainted and other service work done. Paint job was a budget job, but adequate “driver” quality. Interior is clean, with only a little wear on the drivers outside bolster.

Issues I will need to deal with include A/C not blowing cold, a CEL for O2 sensor, a nasty scratch from being keyed, and just a few appearance details to deal with, such as some wheel corrosion.

One thing I want to understand better is the braking system on the ‘94. The brakes work, but it seems to need far more pedal pressure than I am used to in my XKR, and other cars. Also, the throttle pedal takes a bit more push as well. Lubrication?

I am sure other things will come along, and will tap into the vast knowledge base of this forum as I have with my other Jags.

Looking forward to being part of this XJ community!

TC

 
Reply
Old May 2, 2021 | 02:40 PM
  #2  
CharlesHK's Avatar
Member
5 Year Member
Joined: Nov 2020
Posts: 91
Likes: 35
From: Hong Kong
Default

Welcome.

The XJ40 is a very stately car to drive.

A/C and oxygen sensor issues you outline are common. I replaced the O2 sensor when I purchased my car 10 years ago and have had no problems since.

Brake issue: I would check to see when the ABS accumulator was last changed (if service history is available). You can also test the health of the accumulator fairly easily. That is where I would start.
 
Reply
Old May 2, 2021 | 04:58 PM
  #3  
jerry_hoback's Avatar
Veteran Member
15 Year Member
Liked
Loved
Community Favorite
Joined: May 2007
Posts: 3,484
Likes: 1,261
From: Indiana
Default

Nice looking car. Most of the problems you list are not too complex. Theres only the one O2 sensor, and its not TOO hard to get at. The brake pads are not bad to change, but bleeding them is not as simple as it seems, I suggest a closer look into the system before spending too much money. Try the "search this forum" button, there is a lot of info on the brake system, enough to numb your brain (it does mine anyway). Good Luck!
 
Reply
Old May 3, 2021 | 01:27 AM
  #4  
Lawrence's Avatar
Veteran Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Sep 2012
Posts: 2,727
Likes: 1,910
From: Victoria BC Canada
Default

My car used to be nice and shiny like yours a long time ago ..

Ahh ...memories!

Larry
 
Reply
Old May 3, 2021 | 09:14 AM
  #5  
TC Johnson's Avatar
Thread Starter
|
Member
Joined: Feb 2014
Posts: 76
Likes: 17
From: PA
Default Color codes

Lawrence,

I believe mine is the same color combination as yours, but want to be sure. I have looked around the car for a tag with the code, but none found. No original paperwork came with it, so is there a way or place to find out the actual codes? Need some touch up paint for a big scratch.

Thanks in advance to anyone who can assist. And thanks for the views and comments.

TC

PS: I cleared the code and took a long drive, with nor recurrence of the Fuel 44 code. There is low confidence that the family fed it 93 octane fuel, so want to siphon a bit out and rectify that. Now for the A/C.
 
Reply
Old May 3, 2021 | 08:55 PM
  #6  
Lawrence's Avatar
Veteran Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Sep 2012
Posts: 2,727
Likes: 1,910
From: Victoria BC Canada
Default

TC - Trim code is usually on the driver's door pillar, low down.

Larry
 
Reply
Old May 5, 2021 | 09:03 AM
  #7  
Don B's Avatar
Joined: Feb 2014
Posts: 20,472
Likes: 15,250
From: Crossroads of America
Default

Hi TC,

Welcome to the XJ40 Forum and congratulations on that beautiful Jag!

Here are links to some documents that will be helpful in your XJ40 journey:

Haynes Jaguar XJ40 Repair Manual

Jaguar XJ40 Electrical Guide 1994

Jaguar XJ40 Power Hydraulic System S-73

Jaguar AJ6 4.0L Engine Management System / OBDI DIagnostic Guide S-91

Cheers,

Don
 
Reply
Old May 15, 2021 | 03:40 AM
  #8  
mickvic's Avatar
Senior Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Dec 2012
Posts: 425
Likes: 57
From: melbourne australia
Default

Don any publications on the heater...climate control air con system?
 
Reply
Old May 17, 2021 | 07:18 PM
  #9  
Don B's Avatar
Joined: Feb 2014
Posts: 20,472
Likes: 15,250
From: Crossroads of America
Default

Originally Posted by mickvic
Don any publications on the heater...climate control air con system?
Hi Mick,

Sure. See the attached files, as well as the file available for download at the link below (the file is too large to attach to a post):

Delanair Mk IV Air Conditioning System

Cheers,

Don
 
Attached Files
File Type: pdf
XJ40_HVAC_Design.pdf (2.02 MB, 65 views)
Reply
Old May 30, 2021 | 06:52 PM
  #10  
catmanboo's Avatar
Junior Member
Joined: Dec 2012
Posts: 28
Likes: 7
From: atwater, ohio usa
Default

An exact duplicate of my late '94. What are the last 6 numbers of your VIN? Just curious...
 
Reply
Old Jun 3, 2021 | 12:32 PM
  #11  
TC Johnson's Avatar
Thread Starter
|
Member
Joined: Feb 2014
Posts: 76
Likes: 17
From: PA
Default

Catman,

What is your VIN, and I can compare to see how far apart they were made.

I am starting to gather the parts I need to deal with the few things it needs. Have an O2 sensor, but not sure I need it now since there has been no CEL since I reset the code. Still has some long crank before start issues, and when I attach my plug tester light to the #1 plug wire, it will crank with no indicated spark, and then on another attempt will flash and the car starts. Might be a coil or cap and rotor issue, but if anyone else has seen this, I am open to suggestions. Relays?

TC
 
Reply
Old Jun 4, 2021 | 07:40 AM
  #12  
catmanboo's Avatar
Junior Member
Joined: Dec 2012
Posts: 28
Likes: 7
From: atwater, ohio usa
Default

Well, I asked you first, but mine was just a couple months from end of production. Last 6 are 706184. Issues are headlights that come on by themselves but can be temporarily cut off by cycling the switch( but inevitably come back on, previously researched on this forum to no avail). Unplugging it has no effect. EGR valve has no vacuum going to it, along with the accompanying code on display, may be the solenoid valve. Long cranking to start, less prevalent in cooler weather,but believe it or not, will usually fire right up after sitting all winter in safe storage. May be fuel pressure regulator. And the biggest pisser is the delayed braking, along with pedal bounce-back combined with brake & ABS lights. I'm reasonably sure the accumulator ball must go, along with a complete fluid change & bleed. I sure hope the master cylinder is ok, prices are stupidly insane for replacements. I've fixed several issues in the past few years, but it's a work in progress. Get some manuals/tech data & start learning all about yours, it gets more interesting the deeper you go, also a bit demoralizing for a couple things. Hang in there, beware the rabbit hole!
 
Reply
Old Jun 4, 2021 | 11:41 AM
  #13  
TC Johnson's Avatar
Thread Starter
|
Member
Joined: Feb 2014
Posts: 76
Likes: 17
From: PA
Default

Catman,

Mine is 700869 so a bit earlier in the year's production than yours. I was gone for several days and had the battery on a tender, and once I took out the power cutoff switch the PO had on it, it has been starting well these last couple of days. Will leave it alone for the next day or two to see if the battery holds its charge, and starts up without drama. It has an H5 battery right now, but might be worth the upgrade to H6 as there is room in the tray for one.

Just developed a squeaky belt, so looks like those need a refresh. I knew it had cheap low-end tires when I bought it, and a nice flat spot on one of the rears from sitting flat, so have been shopping for a new set of tires. they ar 16s so not as difficult to find as the 15s have been for others.

Speaking of tires, are people using H-rated rather than V-rated tires as replacements? I know the virtues of the V rating are a bit stiffer sidewall, etc., but I won't be driving too much over the limit in this car, so an H-rating seems adequate. Unless this group has other reasons to support the higher speed rating.

Thanks again for the comments.

TC
 
Reply
Old Jun 4, 2021 | 10:25 PM
  #14  
Lawrence's Avatar
Veteran Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Sep 2012
Posts: 2,727
Likes: 1,910
From: Victoria BC Canada
Default

I run Kumho Ecsta platinum tires, they are 98W rated.
 
Reply
Old Jun 5, 2021 | 02:49 PM
  #15  
Don B's Avatar
Joined: Feb 2014
Posts: 20,472
Likes: 15,250
From: Crossroads of America
Default

Originally Posted by TC Johnson
Speaking of tires, are people using H-rated rather than V-rated tires as replacements? I know the virtues of the V rating are a bit stiffer sidewall, etc., but I won't be driving too much over the limit in this car, so an H-rating seems adequate. Unless this group has other reasons to support the higher speed rating.
Few XJ40 owners are going to get their cars past 149 mph, but a valid reason to consider V-rated tires is that the suspension of the XJ40 was tuned with the stiffer sidewalls taken into account. I ran some H-rated Sumitomos for awhile and found the handling to have noticeably more roll while cornering.

An even more important issue to consider is the weight rating of the tires you choose, since the XJ40 weighs around 4,000 pounds.

Cheers,

Don
 

Last edited by Don B; Jun 15, 2021 at 10:07 PM.
Reply
Old Jun 21, 2021 | 03:24 PM
  #16  
catmanboo's Avatar
Junior Member
Joined: Dec 2012
Posts: 28
Likes: 7
From: atwater, ohio usa
Default

Originally Posted by TC Johnson
Catman,

Mine is 700869 so a bit earlier in the year's production than yours. I was gone for several days and had the battery on a tender, and once I took out the power cutoff switch the PO had on it, it has been starting well these last couple of days. Will leave it alone for the next day or two to see if the battery holds its charge, and starts up without drama. It has an H5 battery right now, but might be worth the upgrade to H6 as there is room in the tray for one.

Just developed a squeaky belt, so looks like those need a refresh. I knew it had cheap low-end tires when I bought it, and a nice flat spot on one of the rears from sitting flat, so have been shopping for a new set of tires. they ar 16s so not as difficult to find as the 15s have been for others.

Speaking of tires, are people using H-rated rather than V-rated tires as replacements? I know the virtues of the V rating are a bit stiffer sidewall, etc., but I won't be driving too much over the limit in this car, so an H-rating seems adequate. Unless this group has other reasons to support the higher speed rating.

Thanks again for the comments.

TC
I installed Goodyear Eagle Sports several years back, 225/60R16 98V. As much as I drive it (or don't) they should last quite some time. Had some real crap tires when I bought it, pulled to the right even after swapping them around. The G-years cured that.
 
Reply
Old Aug 19, 2021 | 10:07 AM
  #17  
eksjaysix's Avatar
Senior Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2020
Posts: 133
Likes: 41
From: New York
Default

Originally Posted by TC Johnson
Greetings!

New to this group, but not new to the forum. Stumbled across a 1994 XJ6 near me with only 48k miles, and being sold by the family of the elderly second owner since 1997. PO had only put about 16k miles since his purchase, and had recently had it repainted and other service work done. Paint job was a budget job, but adequate “driver” quality. Interior is clean, with only a little wear on the drivers outside bolster.

Issues I will need to deal with include A/C not blowing cold, a CEL for O2 sensor, a nasty scratch from being keyed, and just a few appearance details to deal with, such as some wheel corrosion.

One thing I want to understand better is the braking system on the ‘94. The brakes work, but it seems to need far more pedal pressure than I am used to in my XKR, and other cars. Also, the throttle pedal takes a bit more push as well. Lubrication?

I am sure other things will come along, and will tap into the vast knowledge base of this forum as I have with my other Jags.

Looking forward to being part of this XJ community!

TC
TC, sorry I am late to the celebration, but I am not sure whether to express sincere congraltuations on a marvellous aquistion, or be petty and be jealous! Seriously, just fantastic. These have been one of my favorite vehicles since it was in the final stages of its LOONNNNNGG development period, and I love mine. In a way it is nice that so many survive that were owned by someone who probably reached a comfortable income in middle age, treated themself, and cherished it. But, yes, just always glad to see a gem like this go to someone who will treat it with the level of conservation it deserves. Regardless if it is used as a daily driver or a show car, just glad it is not defiled with attrocious modification (donk wheels anyone?) Cheers!
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Alfred Firmani
XJ6 & XJ12 Series I, II & III
5
Aug 20, 2021 04:49 AM
BeckBeck
XJ40 ( XJ81 )
31
May 30, 2017 11:50 PM
Hollowitz
XJ40 ( XJ81 )
10
Nov 18, 2016 06:57 PM
dskul1
XJ40 ( XJ81 )
9
May 28, 2016 03:21 PM
1990XJ6
XJ6 & XJ12 Series I, II & III
2
Oct 25, 2015 05:01 AM

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



All times are GMT -5. The time now is 10:18 PM.