1990 Jaguar XJ6 2.9 Manual from UK and Ireland - Comments

25th Dec 2002, 06:14

"The best £800 I have ever spent on a car.."

What things have gone wrong with the car?

Nothing really, central locking on one of the rear doors failed, but I fixed it. Seal on the petrol filler neck had perished and made the boot damp, I replaced it myself. The part cost £4 from a dealer!

I looked at lots of old Jags before choosing this one. My advise is buy the best you can for as little as possible. There are some genuine bargains out there.

General comments?

Its only a 2.9 and so needs full throttle to get it to move!

But once the old girl gets going it will outrun the average hatchback.

Full leather interior, wood, climate control, chrome and full electrics. I have never experienced a car so luxurious for the money. It can do 28 MPG on the motorway which is not that bad for such a big car.


17th Mar 2004, 09:04

I own a 1989 2.9 Jaguar and it does have a problem with detonations which are mentioned in the Jaguar Handbook and only related to the 2.9. When the detonations occur the smoke emitted from the exhausts is of such density that everything behind is totally obscured. Imagine the embarrassment. This model does not like short journeys nor does it like the winter season. It seems that in cold weather the choke causes heavy deposits of carbon which,when the engine heats up and is then placed under load, produces detonations which are caused by the carbon burning off. I have not figured out how it also burns so much oil when these detonations occur.

Cheers - Jerry.


10th Sep 2004, 11:21

I think the smoke is actually the deposits burning off rather than engine oil being burnt.

I have a vague memory of reading something in a magazine around 1990 about this issue on 2.9 XJ6 Jags and the solutions suggested were:-

- rev the engine to the redline until it stopped smoking (!)

- use leaded fuel (which isn't an option now)

- take the cylinder heads off and decoke everything (best solution, but the most time consuming also)

Using multivalve engine cleaner (one bottle per tank) might be the best solution - ideally before a long trip.

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