Many thanks for these tips. I know the fuel filter was replaced 10,000 miles ago as the car had little mileage for 3 years a full srvice plus was carried out. I have suspected a temperature sensor but did not know where to start. , so I will get on to my local Jag main dealer.

The engine turns over freely - often fires just once when initially turned on then dies. The battery is less than 2 years old and happily turns the engine over for long periods, but I have also tried adding a booster to ensure a good charge to no apparent avail. I have made the error of short journe...

I have had my 1998 XJ8 for exactly year, no problems starting last winter but the recent cold snap made it impossible to start when there was a frost about. Once running it is fine until the freezing night! Any ideas?