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Discussion Starter · #1 ·
Hi again Guys,

New owner of a 2004 XJ8 X350.

I attended my local Church for the Sunday service and when I drove away to return the 2 miles home an amber warning light showed on the dashboard and the message " Air Suspension Fault ". My heart sank and I felt sick inside my gut.

The suspension seems to be fine.

Once home I had lunch and two hours later the warning light and message had disappeared and all has been ok since.

Any ideas and I hope it's just a weird glitch or something simple.

Thanks in advance.

Supertrev.


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My first thought would be battery, especially when such a short journey is mentioned, and the warning of the fault disappears.
I keep mine topped up with a CTEK battery conditioner.
 

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Hi again Guys,

New owner of a 2004 XJ8 X350.

I attended my local Church for the Sunday service and when I drove away to return the 2 miles home an amber warning light showed on the dashboard and the message " Air Suspension Fault ". My heart sank and I felt sick inside my gut.

The suspension seems to be fine.

Once home I had lunch and two hours later the warning light and message had disappeared and all has been ok since.

Any ideas and I hope it's just a weird glitch or something simple.

Thanks in advance.

Supertrev.

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From personal experience Trev, I would just leave it and see if it reoccurs the trouble is your heart sinks immediately when
you see a warning light as you assume its going to be a big bill.When I had mine I would disconnect the positive lead from
the battery the light would go out and you wouldn't see it for the next three years.If the light comes back on find yourself
a good Jaguar Independent and have him use the Diagnostic Equipment to identify the issue,as a rule its generally more
likely to be connections or sensors rather than modules so try not to worry.What model do you have and tell us a little about
it.
 

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Could be a few things e.g. sensor not working correctly or fault with shocker but more than likely its caused by the car not lifting or leveling within a specified time and the seal on the pump showing signs of wear. It can happen when cold and damp for some reason. I should not worry until the fault starts to show a lot more times or is on all the time. Some people replace the whole pump but there is an overhaul kit available on ebay circa £20. :)
 

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Helo Tevor,
In my experience this is not an uncommon issue with these cars and such warnings do appear to be more frequent during lower temperatures. You should find that after leaving the car for a few hours the fault light will not come on when you restart. Less than that and it will. Disconnecting batteries? No point in my book.
You don't tell us the mileage and service history of this car and whether you know if it's had any air suspension work carried out.
My stab at this is that the compressor (piston ring) has done its time and is in need of a basic overhaul. It could go on throwing up warning message for a couple of years, but you don't know how long it might already have being doing this.
Unless you know it has been done, I would be scheduling to have a new ring installed in the compressor (lives under the front N/s wheel arch). Bagpiping Andy is your supplier man and should cost you around £25 for the part - search EBay for him.
Did you buy the car from a car sales business or privately? If car sales, you should have some redress, but it may be wise to discuss who actually fixes this. Check if you have an independent specialist in your area.
 

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The cold mornings mean that the air compressor has to work harder. I think it has to reach a certain pressure or the car has to achieve a certain height within a time limit (2 mins?) and if it doesn't then the warning light is triggered. I got through a whole winter just ignoring it and when the weather warmed up I stopped getting the messages. Eventually I got round to getting the compressor changed and it has been fine ever since. Getting the codes read will confirm that this is the problem and if you are at all hands on then as mentioned above a seal kit to refurbish the compressor is available. I gave my old compressor away so that someone
could refurbish it whilst still driving the car. Perhaps a member has one lurking in the garage?
 

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My experience exactly, but in terms of overhauling the existing compressor, I would certainly dismantle and assess if a new ring will do (usually does) rather than renewing the whole unit. The fiddle is getting the compressor out - or particularly getting it back in!- rather than changing the piston ring once you have it on the bench.
 

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Discussion Starter · #8 ·
RED DIESEL MEMBER - PART -
What model do you have and tell us a little about
it.
Hi to all and thanks for the superfast replies to put my mind at ease.
Just started the car this morning and no warning lights and car seems level and all ok.
I think I will leave it for now and hope all stays fine.

My car is a 2004 3.6 v8 in (sunlight stunning) - Metallic Racing Green with as new and unmarked Light cream leather interior.
It came with a fully stamped service book.
The first 2 services were at the Jaguar Browns Lane factory, the following 7 at Cambridge Jaguar main dealer, 10th at Guy Salmon main dealer at 11th at an ordinary garage.
All old MOT's, some invoices inc new Cats and radiator early this year for £2,400.

All the service stamps and MOT's confirm the 109,000 mileage.
I paid £3995 and I'm very very pleased and happy now and so far.
A mate of mine for 45 years now is a long term Jaguar, Rolls Royce and Bentley owner/enthusiast and he looked over the car when I went to show him and he said I got myself a very nice and genuine example. In fact I took his advice and bought the 3.6 v8 over the 3.0ltr v6.

I have another slight problem posted here to do with the alarm but that really doesn't bother me that much because overall I am really chuff with my lovely (almost mint condition) Jaguar.

Thanks Guys once again.

Supertrev.

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Did you by any chance have rear seat passengers to and from church, or a heavy load in the boot that you took into church and put back in the boot afterwards ? That would involve the rear (mainly) suspension in a fair amount of re-levelling; up for the run to church (down when unloaded) and up again for the return journey. The reservoir may have had sufficient pressure to do the first raise without its pressure falling low enough require the compressor, but have hit the lower pressure limit on the return run.
 

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Our cars can be a bit temperamental, more often than not due to cold weather and an old battery.

A battery conditioner like the CTEK MXS5 is a must and very wise suggestion.

The 3.6 V8 is a great choice, enjoy!

Rich
 

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SuperTrev, don't think you need to worry, I ran a 2005 350 for 3 years, two weeks after I picked it up I had the Air Suspension warning, panicked, rang the dealer (HA Fox), told me the fault would almost certainly clear - which it did, but if it persisted, to bring it in for a check. It did not persist, but I still occasionally got the fault, usually after a lot of rain - I put it down to sensors, and the car not getting to the required height in time. Never had the compressor changed - I now have a 2011 XJR SS, the naggy fault I get with that is a tyre pressure monitor system fault, but only when the weather changes (usually caused by low atmosphere) !!, minor problem to a superb car !!
 

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RED DIESEL MEMBER - PART -

Hi to all and thanks for the superfast replies to put my mind at ease.
Just started the car this morning and no warning lights and car seems level and all ok.
I think I will leave it for now and hope all stays fine.

My car is a 2004 3.6 v8 in (sunlight stunning) - Metallic Racing Green with as new and unmarked Light cream leather interior.
It came with a fully stamped service book.
The first 2 services were at the Jaguar Browns Lane factory, the following 7 at Cambridge Jaguar main dealer, 10th at Guy Salmon main dealer at 11th at an ordinary garage.
All old MOT's, some invoices inc new Cats and radiator early this year for £2,400.

All the service stamps and MOT's confirm the 109,000 mileage.
I paid £3995 and I'm very very pleased and happy now and so far.
A mate of mine for 45 years now is a long term Jaguar, Rolls Royce and Bentley owner/enthusiast and he looked over the car when I went to show him and he said I got myself a very nice and genuine example. In fact I took his advice and bought the 3.6 v8 over the 3.0ltr v6.

I have another slight problem posted here to do with the alarm but that really doesn't bother me that much because overall I am really chuff with my lovely (almost mint condition) Jaguar.

Thanks Guys once again.

Supertrev.

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A lovely car and you were given good advice regarding choosing the V8.as you say leave it for now
 

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Discussion Starter · #14 ·
Hi to everyone and thanks for all the reply advice.

If you care to check out this photo hosting website link then you can view all my pics including my cars and superbikes.

By the way, I'm a part disabled person with a condition known as Dystonia which I have suffered from since 16 years old 1971.

Link;

http://imgsrc.ru/main/user.php?user=supertrev

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Discussion Starter · #15 ·
Hi again Guys.

2 questions below.

The pesky air suspension fault light has shown again.
The car seems perfectly balanced etc.

Should I leave it and see if it clears again ?.

I found the £25 compressor piston repair kit and instruction video on Fleabay UK.

So, I'm just wondering where the compressor is on the car and how to remove it ?.


Thanks in advance.
Supertrev.
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Hello Trevor,
I think you will generally find that the warning will disappear when the car is left for a few hours or so, but is likely to return - particularly in the colder weather. It may be worth holding the revs. at around 1500 for about 2 minutes before moving the car to give the compressor time to build up the pressure.
The compressor lives under the front of the front N/S wheel arch as mentioned - behind the front bumper. I'm not sure what your disability is, but this is a fiddly job as opposed to a technically difficult job. I think you would be wise to obtain a number of new arch fixing fasteners since they invariably seize and have to be drilled out and replaced.
Did you buy your piston ring from Bagpiping Andy by the way? I understand there are other suppliers, but I believe Andy is the original and.....
Perhaps it might be wise to get a quote to replace the ring from an independent.
 

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Discussion Starter · #17 ·
Hi Austin and thank you.

Yes, Fleabays Bagpiping Andy is the supplier and I've added the item to my watch list.

I will try your rev suggestions tomorrow morning if the light is still on.

Supertrev.

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Hi Austin and thank you.

Yes, Fleabays Bagpiping Andy is the supplier and I've added the item to my watch list.

I will try your rev suggestions tomorrow morning if the light is still on.

Supertrev.

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I'm afraid that revving the engine won't help.
The compressor is electric not belt driven so it run at the same speed whatever the engine revs.
The compressor only runs for about 2 minutes at a time to stop it overheating and if it doesn't put enough air into the system after 2 run cycles it throws a warning light.
 

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Discussion Starter · #19 ·
OK Pete, thanks.

I will order the repair kit from Fleabay now and hope someone can help me overhaul the unit.

I can overhaul it once off just getting it off while outside on the marina car park concerns me a little so if anyone local to Leicestershire/Warwickshire could help me then please let me know, thanks all.

Supertrev

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OK Pete, thanks.

I will order the repair kit from Fleabay now and hope someone can help me overhaul the unit.

I can overhaul it once off just getting it off while outside on the marina car park concerns me a little so if anyone local to Leicestershire/Warwickshire could help me then please let me know, thanks all.

Supertrev.
There are a few of us in this particular boat Trev - obviously a well reported nuisance with our cars...

Personally, As I know there is no major implication to the road holding, I'm going to leave mine until the weather improves.
After all, my days of sitting on a freezing cold tarmac surface are gone now - and damn good riddance!

By the time I get around to fixing mine, Spring will be in full flow and temperature will be 55 degrees plus again.

Phil.
 
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