XJ XJ6 / XJR6 ( X300 ) 1995-1997

Faults with my XJR

 
  #1  
Old 03-21-2019, 10:22 AM
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Default Faults with my XJR

Hello
I had to buy jaguar again, it has been a while since i had my last one. It is British racing green X300 XJR. There is few annoying faults and lots of smaller ones which are obvious.

Jag won't blow warm air... except when I make really hard accerelations. I cant think anything else that it is head gasket... but i checked coolant reservoir and it is just normal red coolant, it is not grey or white and no bubbles even if i raise rpm. Anything else what could cause this. Also seller said that air condition wont blow cold air, but compressor works. It is still winter and i dont need cooling, luckily i have heated front and rear screens and they work.

Second problem heated seats, clock, hazard lights, central locking button, or headlight leveling dont work and lights in that same panel dont work, so is it faulty panel?

Third fault is when i engage Drive it bumps aggressively. But it does it only when I drive, stop and change gear and back to D. But I believe fault is caused by high idle. After driving idle is somewhere 1000rpm.

And the typical jag handling, when road is worn and there is grooves, it has to be steered all the time and feels like rear is moving side ways. Of course driving in worn road is not as good as new road but every other car i own is lot more better to drive than jag, even jag is so beutiful. I guess there is some problems with bushing but i cant find any faults nor MOT inspector. Tires are kumhos and there is lot of tire "surface"? to be use. Those are not old or cheap china tires
What tyres you suggest? Avon, michelin pilot sport? and those are 18" rims

Tried to google these but only could find clock ribbon cable faults. Could anyone help.
 

Last edited by NIgor; 03-21-2019 at 10:26 AM.
  #2  
Old 03-21-2019, 04:31 PM
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I had loads of little faults with mine that cleared themselves just by driving it around.
The first thing I would do is put a new battery in (make sure that you have the radio code); just doing that can sort a few gremlins out.
XJR6s are known for tramlining; the tyres that you have on may have a good name but could be 15 years old.
I don't know anything about the heating/cooling system I'm afraid.
Good luck!
 
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Old 03-21-2019, 07:51 PM
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The cabin heater has a extra electric water pump just fwd and lower from the brake booster diaphragm for a LHD . Your supercharger intercooler has the same electric pump the fwd right side I believe

the brushes wear out and are part # A33

you can hit it with a broom handle and maybe loosen up the brushes for a little bit more life

The high acceleration overcomes a bad electric motor and is common

The A/C control panel has a built in self test in this TSB :

http://www.jagrepair.com/images/TSB/...stem%20DTC.pdf

Youtube video to save translations :

 

Last edited by Lady Penelope; 03-21-2019 at 08:07 PM.
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Old 03-22-2019, 08:17 AM
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Great! Just bought new electric waterpump. And the battery is new. Bigger streets arent snowy anymore here in finland so jag is in everyday use.

Today I will order new front tyres Avon ZZ7 or Pilot sport 3 comfort is first priority. Fuel consumption or sporty ride doesn't matter.

Thank you for help hopefully water pump and tyres fixes these problems. Just 2 big problems left, any idea?
 
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  #5  
Old 03-22-2019, 07:05 PM
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Remind us; which 2 problems left?
 
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Old 03-23-2019, 04:09 AM
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Panel which has central locking, hazard lights, clock and heated seats button doesnt work. There is no lights.

and transmission engages drive very aggressively
 
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Old 03-23-2019, 10:41 AM
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I don't know about the transmission.
the clock panel is possibly a fuse or the plug has dropped out of the back.
There are videos on YouTube on how to remove the X300 clock panel, it's not a difficult job.
 
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Old 03-24-2019, 04:14 AM
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I find out what was problem with trans. Its broken. Yesterday when i was driving home it started slip and then came horrible voice and it died. I gues metal in oil pump. It wont move properly with d or r but in 2 and 3 it works just as it should?

what do you recommend? Rebuild or change trans? And how difficult rebuild is
 
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Old 03-24-2019, 11:16 AM
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Me not having the Gm 4L80E transmission engine there is this :

http://www.jagrepair.com/images/TSB/...Engagement.pdf

Where do you go from this , I don't know
 

Last edited by Lady Penelope; 03-24-2019 at 11:24 AM.
  #10  
Old 03-25-2019, 02:47 PM
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Jaguar X300 gearboxes are quite reliable so if you can find one close by, a simple replacement might be more practical than finding parts and a workshop to rebuild the gearbox.
 
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Old 03-30-2019, 11:39 PM
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Really stupid question to your panel problem, but given the age of your car, is it possible that some of the fuses have burned out? Iím sure youíve considered and likely checked that already, but in the off chance you havenít, it could be something small and easy to replace like that.

Let us know how it goes with your transmission!
 
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Old 03-31-2019, 05:03 AM
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Fuse uprating TSB on link below ;

http://www.jagrepair.com/images/TSB/...s_Circuits.pdf

Fuse table on page 21 of the file attached below ;
 
Attached Files
File Type: pdf
X300 1996 LWB.pdf (2.14 MB, 3 views)

Last edited by Lady Penelope; 03-31-2019 at 05:07 AM.
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Old 04-10-2019, 02:32 AM
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I took trans out of spare part xjr, yesterday I lifted on the place and today after work I will bolt on it. When I get it working I will check those other problems... I guess it has also high idle problem. Fuel consumption was horrible i got 22.7 L/100km and my girlfriend got 20.5 L/100km. I will remove catalytic converters and block egr if it has one.

Also when I lifted jag i noticed there is loose in every tire which caused horrible driving experience, also have to check that.

What experience you got about fuel consumption? When I bought it and drove home consumption was 9 L/100km but it was mainly highway driving at 80-90kmh
 
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Old 04-29-2019, 07:02 AM
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Heater blows hot air when i want, i replaced water pump and fuse was also burned. I made 2000km trip to saint petersburg, russia and jag was great, only right front brake caliper was detached because previous owner hadn't tighten those bolts but luckily i found that bolt and had tools. Today when i went to buy food I noticed trans failure light on dash and overdrive didn't engage. Read fault codes and found P0756 Shift solenoid B perfomance. I cleared fault codes and trans worked just fine when i drove to work.
I'm planning second trip to saint petersburg on june, but I'm bit afraid of that trans... What would you recomend? I have drove less than 3000km with those trans oils.

Also ordered new front tyres 245/40 R18 Michelin Pilot sport 3.

Fuel consumption for the russia trip was 18.6 L/100km. Mainly highway driving but also lots of traffic jams and city driving in saint petersburg.

Also that same fault what i had with previous trans is starting to come. When trans is hot and i shift from reverse to drive the gear bumps on. Starting to think trans swap... or maybe just swap ls3
 

Last edited by NIgor; 04-29-2019 at 07:07 AM.
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Old 04-29-2019, 07:26 AM
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The various Jaguar X300/X308 ZF transmissions can be problematic in their own ways, but the XJR6 uses the GM 4L80E (heavy truck) transmission which is nearly indestructible, not to say they can't fail if mistreated or just bad luck.

But the reason I say this is that there is an issue we see with these cars where the transmission mount is worn/broken, and the transmission then moves too much, stressing and breaking the wiring harness where it goes through the transmission tunnel under the center console. This causes various intermittent transmission faults, and sometimes complete malfunction even though the transmission itself is fine.

If you change transmissions and keep having the same failures, you may want to also check the transmission harness wiring.

A search should bring up some threads on the transmission harness and fault issue.


Glad to hear that replacing the heater circulator cured your no heat issue. If it is still unsatisfactory we've also found that flushing the heater core helps, as it can get clogged with old coolant residue.


BTW, I also experienced terrible tramlining with the correct sized Kumho tires on my XJR. The Michelin tires I installed eliminated the tramlining.
 
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Old 05-10-2019, 05:02 AM
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Those michelin tyres are amazing!

Every morning when i go to work with jag trans goes to limp mode and gives that same code P0756... But when I drive to home it works as it should. Morning temperature is about -1 to -4 and afternoon temp is about 5-10 degrees celcius.

Also read those engine codes even the check engine light is not illuminating and i found code P1333... same code as my previous xjr jag... It runs quite well, just a little bit unstable idle but biggest problem is that fuel consumption 22L / 100km which equals 10.7 miles per gallon (US). So much more than anyone else.
 
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Old 05-10-2019, 09:12 PM
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Your recurring transmission code P0756 solenoid B performance probably means you need a new solenoid. That is very easy to do relative to an entire transmission swap, just a pan drop to reach the solenoid.

How is the fluid level? In my experience (or maybe just for this application), the transmission is very sensitive to fluid level. Check it when HOT and keep in mind that the "good" range for hot readings is only about 12 oz (350ml).

Cold weather like yours can do strange things to cars!
 
 
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