Hi Catfondler, I saw the post about the evap system but haven’t had time to go through all the checks, but I am pretty sure its ok as it would surely affect all cylinders if it was faulty, and an air leak would make the fuel trims go positive on both banks I imagine.
The IMT plugs can’t be mixed as they are different lengths, I didn’t swap them over as you have to remove the manifold to get the lower one out and I am getting grief from the missus for coming home 3 hrs late from working on the Jag! Problem is time as I have 4 other projects on the go, the wifes car needs some work, I am restoring 4 Volvo Amazon cars for a friend, I have some work to do on a friends boat and have to get my own boat out of the water before winter.
Injector testers are great but I don’t have access to one so when I get the 2nd hand rail I will try to pressurise it on the bench to check there are no leaking injectors and then swap 3 of them with those on bank 2 which is the only bank giving problems.

 

Finally found the fault with my engine which has dragged on for months. I haven’t been on the spanners for a few weeks due to a heart operation, but I decided to remove the catalyser to see if its damaged, after fighting with rusted bolts for a couple of hours I gave up as I could see its a two day job as so much has to be removed before you can even get to the cat. However while I was under the car I took out the O2 sensors and using an endoscope camera managed to inspect the inside and it looked like the melt down at Chernoble inside, there was lots of melted parts lying at the bottom and obviously causing baxk pressure on the front bank and giving low oxygen readings which the ECU interprets as excessive fuel delivery so cuts back giving me the high negative fuel trims I am getting. New cat ordered from Magnaflow as Jaguar no longer supply them, should get it in Jan so fingers crossed this will get my Jaguar purring like she used to.

 

Next task after changing catalytic converter in January:

Why the old one was melting away? (Why too hot? Why to much unburned fuel leaves the cylinders for afterburning [post oxidation] in the catalytic converter?)

(I've already survived two heart attacks and operations... Congratulations to you! *happy* Live long and prosper!)


Cheers, catfondler

 

Many thanks Catfondler, will keep you posted when I get the converter.

 

Any progresses?

 

Yes I replaced the cat, it was a 7 hr job even though I am a mechanic and had it in the workshop with all the tools I needed mainly due to rusted bolts needing drilling out and retapping on the under tray and heat shield.
But it runs just like new now, I think I must have had a misfire which managed to overheat the cat and destroy it in a very short time.