I can now report that the engine malfunction has been cured. The crank sensor was failing when hot and replacement has solved the problem. I gather that original Jaguar ones are no longer available, so we will see how long this one lasts. Thanks everyone for all your useful comments.

David.

Many thanks for all the useful comments for this very frustrating fault. I don't have any diagnostic kit because the car has always been serviced and cared for by the Main Dealer, or from 2003 by a Specialist Jaguar garage (who tends to "look after" the car, rather just follow the service sheet). Th...

Thank you Peter for your response. I can start the car normally from cold and everything works as normally. The car accelerates up and down our drive without hesitation and will revs freely. It is only when the temperature gauge reaches the normal operating level (and after several minutes at this l...

Help please! I have had my 1995 X300 Sovereign 3.2 from new and it has been remarkably reliable (98,000 miles from new). It has always been maintained by a Jaguar Specialist, but has been hardly used during this awful pandemic. It was serviced in November and was fine then. I have tried to keep thin...

As far as I know, Ladbroke Avon, who produced the Avon-Stevens convertibles, only converted two door coupés (XJC) and only series 2 cars (there is one series one prototype). Some have been upgraded to look like series 3, but were not originally like that. I keep a register of all known Avon-Stevens ...

Just returned from a trip to France and can report that the new tyres have performed well. However, they don't seem as quiet as the original P4000s and there is far more "bump, thump" over rough roads. I ran them at 28psi front, 30psi rear for the trip and would appreciate any comments. The ride is ...

Thanks for all the advice from members regarding my X300 Sovereign tyre replacement. I have just fitted a set of Pirelli P7 Cinturato 225/60 16s and they seem satisfactory so far. I note that modern tyres look very different, with much wider grooves and not much tread! It will be interesting to see ...

Thanks for the prompt response. It seems that I have quite a choice: shame though that Pirelli no longer makes the original ones. The first set lasted to 39,763 miles, the second were replaced after 26,794 and I've now done 20,100 on the current set. This reflects the change of use over the years an...

I have owned my X300 Sovereign from new and it has always been shod with Pirelli P4000 225/60 ZR 16 tyres. I am now about to have a new set of tyres fitted, but find that the Pirelli tyres are no longer available at my local tyre factor. What are the options please? What are the current recommendati...

Welcome Bob: I'm sure that you will enjoy the JEC. I joined in 1985 and have used Jaguars and Daimlers as my everyday cars since 1984 (Alvis before that). My first was a series 1 Jaguar XJ6 4.2 auto in red with biscuit leather. I then had a 1977 Daimler 3.4 Sovereign auto and 1976 Daimler Vanden Pla...