Have just joined.
Own a XJ6 4.0 December 1993 model with only 140,000kms.
Needing some help.
Rob

 

Welcome to the forum.

 

Recent Action: Have added the following new parts in the last week: fuel pump and strainer sacks, fuel filter, spark plugs and leads, distributor cap and rotor, ignition box under coil, and air flow meter. The fuel injectors have also been cleaned as well as all electrical connectors in the engine bay. The crank angle sensor and catalytic converter has also been cleaned and inspected. All engine hoses have been checked for vacuum etc.
Problem: While the addition of the above is costly and good maintenance, it has not solved the following problem. While the car will run at idle, as soon as the accelerator is pushed down, the motor coughs and will not increase its revs either in or out of auto gears. If the throttle is very very gradually pressed, the engine will rev up to 2,500 rpm and then coughs and returns to idle revs at 700rpm.
Any Suggestions from Forum Members: My Jag mechanic is stumped. Any members had this problem and what solutions might you have had.
HELP!
Rob

 

Hi Rob, if you repost your question in the XJ40 forum the members there will be able to help you out. Click on the link below.

https://www.jaguarforums.com/forum/xj40-xj81-25/

There are some threads in the Qld Forum that will point you to some local Independant Jaguar workshops recommended by SEQ members. Link below.

https://www.jaguarforums.com/forum/a...queensland-92/

 

Welcome to the Forums.

 

welcome to the forum - hopefully you get the answers you need to resolve your problem - enjoy

 

Welcome to Jaguar Forums zzrhersc,

Good to have you with us.
I see that you have found your way to the tech section.
Enjoy the forum.

If you haven't done so already you should add your car details to your signature to help others to help you.
If you need help with getting around and using the forum follow this link for some help Forum Help

 

Welcome aboard Rob.

 

Welcome to the forums from ElinorB.
(';")

 

Welcome to the Forums Rob! I'll add you to our Queensland Roll over here and keep you posted on any gatherings or shin digs if your keen:

https://www.jaguarforums.com/forum/a...-119698/page8/

I'm sure with the Guru's on the forum you'll get your XJ sorted in no time as well

 

Welcome Rob, we will try to help

 

Welcome to the forum Rob,

Good to have you with us at Jaguar forums.

I've can see you've already found your way to the XJ40 forum.The 'HOW TO' thread at the top of XJ40 forum is a good place to start for information on regular issues.

Please remember to add vehicle details to your Signature to help others to give relevant advice. Go to the User CP button on the left of the top menu bar, then Settings & Options under Your Control Panel. Select Edit Signature and enter the details.

Enjoy the forums.

Graham

 

Many Thanks for all the help and advice I have been given previously.
I sought the diagnostic advice and professional help of a Jaguar Specialist here in Brisbane, Australia.
It turned out that over the years since the car was built in 1993, there has been interaction between the fuel vapours in the air above the fuel level and the inside roof of the tank. This caused contamination on the roof of the tank which was falling into the fuel leading to a blocked fuel pump, fuel pump sock and filter resulting in 15psi at the injectors.
So the tank had to be removed, chemically cleaned, repainted inside and out and reinstalled. A new fuel pump was also installed.
They have done a terrific repair job, moderately priced too, and my Jag is now running like the 'cat' is was designed to be now with 40+psi at the injectors.
So it should last for another 20+ years or so. I look forward to some 'Happy Queensland Motoring'!
Kindest regards
Rob

 

welcome to the forums.
Congratulations on the repair.
Enjoy the drive.

 

Good to hear you got it fixed.

Graham