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My '92 XJR: doubts, ideas, problems, intentions...

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682
Posts: 26
Joined: Wed Jan 22, 2020 9:06 pm

My '92 XJR: doubts, ideas, problems, intentions...

Postby 682 » Mon Jan 27, 2020 8:03 pm

Hi everyone:

I'm not an english speaker so first of all I apologize if I express myself badly. After several years, I've finally been able to buy a 1992 Jaguar XJR. The car seems in good general condition but has been parked/stopped since 2015 due to illness of the previous owner so now the engine doesn't start. I am trying to locate the problem:

·Fuses -- OK
·Fuel hose/pump -- OK
·Spark plugs -- OK
·I've cleaned some electrical connectors from the air intake. I've even disassembled the TPS (cause of the problem in a naki_k topic) but I don't know how to check if it works correctly. I have simply cleaned it up a bit and then I've reassembled it but the engine still doesn't start.
·Next check will be the injectors...

IMPORTANT: On the other hand, I'd like you to recommend me the most complete information guide for this model. I start from zero, no previous experience with Jaguars so I need exploded views, car parts numbers, knowing compatible parts with other XJ40's, repair guides... all that kind of stuff.

Maybe this from Jaguar Heritage?:

https://www.ebay.co.uk/itm/JAGUAR-XJ40-XJ6-XJR-XJ12-1987-94-WORKSHOP-PARTS-MANUALS-PORTABLE-USB-STICK-/202387365052?hash=item2f1f3a1cbc

Thanks in advance.

naki_k
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Re: My '92 XJR: doubts, ideas, problems, intentions...

Postby naki_k » Mon Jan 27, 2020 11:35 pm

As always with non starters.
Establish presence of
Spark.
Fuel
Air
Compression.

Also press the VCM button (turn the key to position 2 and look at the LCD screen), to see if there’s any fault codes present. This will maybe give you clue if any of the sensors are out of range.
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abercanadian
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Re: My '92 XJR: doubts, ideas, problems, intentions...

Postby abercanadian » Mon Jan 27, 2020 11:44 pm

Rotor is an iffy component sometimes, cheap to replace

Larry
94 XJ40 VDP vin 701729
Oyster Metallic/Doeskin on Aero Alloys
240,000 km/149,000 Miles
Daily Driver

94 XJ40 SOVEREIGN vin 703632
Diamond Blue Metallic/Barley
111,000 km/69,000 Miles
Parts Car

pimgmx
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Location: South East of the Netherlands

Re: My '92 XJR: doubts, ideas, problems, intentions...

Postby pimgmx » Tue Jan 28, 2020 12:25 am

Does it crank? (does the start motor engine when you turn the key?)

If the car has been stored for so long, I would start with the fuel system: fit a new fuel filter, check the fuel pressure at the engine bay rail and get the injectors ultrasonically cleaned.

The eBay link you refer to will probably get you what you need, but it is priced rather obscenely at 100+ quid including shipping: it was much, much cheaper back in the day when you could get the CD-ROM from JDHT...

Feel free to send me a PM with your location, I might be able to point you toward more affordable options for that information....

Oh, and while you're at it: do share some more information about your car, a picture or two won't hurt! ;)

the daily: 01 S8 http://bit.ly/2kIwP4m
the eyecatcher: 93 Insignia http://bit.ly/1iGrmsU
the GT: 89 XJS http://bit.ly/1WQGpC5
the diva: 88 Biturbo SI https://bit.ly/3dzdvAL
the ex: 93 3.2 http://bit.ly/14GTNrq

682
Posts: 26
Joined: Wed Jan 22, 2020 9:06 pm

Re: My '92 XJR: doubts, ideas, problems, intentions...

Postby 682 » Tue Jan 28, 2020 1:44 am

naki_k wrote:As always with non starters.
Establish presence of
Spark.
Fuel
Air
Compression.

Also press the VCM button (turn the key to position 2 and look at the LCD screen), to see if there’s any fault codes present. This will maybe give you clue if any of the sensors are out of range.

I forgot to check the VCM (facepalm...) I'm a novice...

abercanadian wrote:Rotor is an iffy component sometimes, cheap to replace

Larry
Thanks for the advice

pimgmx wrote:Does it crank? (does the start motor engine when you turn the key?)

If the car has been stored for so long, I would start with the fuel system: fit a new fuel filter, check the fuel pressure at the engine bay rail and get the injectors ultrasonically cleaned.

The eBay link you refer to will probably get you what you need, but it is priced rather obscenely at 100+ quid including shipping: it was much, much cheaper back in the day when you could get the CD-ROM from JDHT...

Feel free to send me a PM with your location, I might be able to point you toward more affordable options for that information....

Oh, and while you're at it: do share some more information about your car, a picture or two won't hurt! ;)
.
1 - Yes, the car cranks.
2 - I've just checked the injectors and I have important news: only injectors number 1 and number 6 work while cranking, so I will follow your advice to clean them ultrasonically. I'll also try to check the fuel pressure, but I have to learn to do it.
3 - I'll send you that PM
4 - I still don't know how to upload images to the forum. Furthermore, a car stored in a dark garage doesn't have much visual interest... :) But I'll upload some photo, of course. ;)
Last edited by 682 on Tue Jan 28, 2020 2:29 am, edited 1 time in total.

pimgmx
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Location: South East of the Netherlands

Re: My '92 XJR: doubts, ideas, problems, intentions...

Postby pimgmx » Tue Jan 28, 2020 1:51 am

682 wrote:... important news: only injectors number 1 and number 6 work...

That DOES suggest stale fuel...

Do add that fuel filter to your shopping list, it's too cheap NOT to replace it after all those years!

the daily: 01 S8 http://bit.ly/2kIwP4m
the eyecatcher: 93 Insignia http://bit.ly/1iGrmsU
the GT: 89 XJS http://bit.ly/1WQGpC5
the diva: 88 Biturbo SI https://bit.ly/3dzdvAL
the ex: 93 3.2 http://bit.ly/14GTNrq

682
Posts: 26
Joined: Wed Jan 22, 2020 9:06 pm

Re: My '92 XJR: doubts, ideas, problems, intentions...

Postby 682 » Tue Jan 28, 2020 2:48 am

pimgmx wrote:
682 wrote:... important news: only injectors number 1 and number 6 work...

That DOES suggest stale fuel...

Do add that fuel filter to your shopping list, it's too cheap NOT to replace it after all those years!

Is there a generic XJ40 fuel filter or a specific filter for '92 XJR? I'm having trouble searching XJR40 car parts. This model seems to be in no man's land when searching car parts. Lot of confusion by suppliers with other 4.0s, and other XJR's (XJ40 Serie I, X300, X308...)

katar83
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Location: Cambridge

Re: My '92 XJR: doubts, ideas, problems, intentions...

Postby katar83 » Tue Jan 28, 2020 8:16 am

abercanadian wrote:Rotor is an iffy component sometimes, cheap to replace

Larry


Here we go again... :lol: :lol: :lol:

As Naki mentioned, always start diagnosing these things with a can of easy start spray. Spray it into intake, try starting. If it coughs - fuel issue, if it doesn't - electrical issue. Then we start from there.
Since you already mentioned only two injectors working, try cranking the car for much longer than normal, mine used to take 2 minutes to start sometimes because injectors were stuck after sitting for more than 6 months and it would take a while to get them unstuck. Couple would then eventually open up and start firing, then other would follow. You could always have someone tapping them with a small hammer while you crank it, I found recently that this helped get a dodgy injector recently to unstuck too.
There is always a possibility of crankshaft position sensor failing too and best manual for these cars is Haynes. It has all the info you need including electrical diagrams.
1996, 3.2 SWB X300 - Relatively rust free daily driver!
1997, 4.0 LWB X300 - Unlucky car, sold 10.2020!.
1988, 3.6S XJS - Never ending restoration project.
1994, 3.2S X300 - Accident damaged, 10.2015. Gone!
1994, 3.2S XJ40 - First Jaaaag, long gone.

pimgmx
Posts: 3440
Joined: Tue Jul 08, 2014 12:07 pm
Location: South East of the Netherlands

Re: My '92 XJR: doubts, ideas, problems, intentions...

Postby pimgmx » Tue Jan 28, 2020 3:27 pm

682 wrote:Is there a generic XJ40 fuel filter or a specific filter for '92 XJR?

The filter should be identical for all '40s of that build year/VIN range.
Just don't forget to fit need new O-rings when replacing the filter (most brands sell rings & filter combined).

Jaguar Classic Parts is the most reliable source for parts information, but unfortunately they decided to 'update' their website some time ago.
Finding parts after the update can be challenging, to say the least: their site navigation can be utterly frustrating... :cry:

But with some patience you WILL get valuable information from that site, including exploded views.
This is the parts page for the fuel filter et al, up from VIN667829: https://parts.jaguarlandroverclassic.co ... nd/jaguar/

XJ40 VINs are not my strongest point, in case your car predates that VIN this is the relevant page for you: https://parts.jaguarlandroverclassic.co ... nd/jaguar/

Other good parts sources are David Manners, SNG Barratt and BritishParts, usually offering both the OEM and a more affordable aftermarket version of the same part. I can recommend all 3 of them, with the exception of aftermarket suspension bushes: I have learned the hard way that original or Polybush are the only two sustainable options...

For 'NLA' or used parts you will find that forum members like Naki and Adrian are THE go-to sources.
I have bought parts from various forum members over the years (including XXL things like a bumper and a diff!) and have never been disappointed.

Finally: for 'R' specific/NOS parts you can try Black Country Jaguar. They are not cheap, but have some RARE parts in stock!
https://www.ebay.co.uk/str/blackcountry ... cat=579897

the daily: 01 S8 http://bit.ly/2kIwP4m
the eyecatcher: 93 Insignia http://bit.ly/1iGrmsU
the GT: 89 XJS http://bit.ly/1WQGpC5
the diva: 88 Biturbo SI https://bit.ly/3dzdvAL
the ex: 93 3.2 http://bit.ly/14GTNrq

682
Posts: 26
Joined: Wed Jan 22, 2020 9:06 pm

Re: My '92 XJR: doubts, ideas, problems, intentions...

Postby 682 » Tue Jan 28, 2020 9:04 pm

naki_k wrote:Also press the VCM button (turn the key to position 2 and look at the LCD screen), to see if there’s any fault codes present. This will maybe give you clue if any of the sensors are out of range.

I just checked the VCD and it shows "FAIL".


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