I am currently the owner of a 2001 XJ8 VDP with just ovr 158,000 Miles on it....
I have been threw a lot with this car meaning the following

1. New cable from the battery to the engin
2. New coolent system
3. New Transmision
4. All new coil paks (to my knolage)
5. and spark pluge
6. one new o2 sensor
7. all new seals and and all new timeing chains both sides
8. AC refill
9. new throtal body
10. all the fluid flushes
11. new head lights
12. new transmission lines
13. and much more little things

Now the car was runing good for a few mounths then a few months ago it starts missfire ans start to have issues one agian and the car idles very very ruff and has a knock from the lower half of the moter....

I have one machanic that has told me numrious times that my ECU is bad and that I need to go to jag to get a new one installed I do not want to do this if I do not have to because they want 4k for a new one.... could I buy a used one from the junk yard and get my key reprogramed to it????

these are the codes that they car is currently coming up with

1. P1314
2. P1313
3. P1316
4. P0010
5. P0020
6. P308
7. P307
8. P303
9. P1647

Then after this the reccomendaion is that the car needs a new engin.... which I do not want to dump another 10k to do...

Please someone please give me some light to this situation
thank you so much!!!!
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2001 Jaguar VDP

 

Welcome to the forum. I don't know if you live in the US, but if so you could send the ECU to ASI in Tennessee and they will test it for $55. If necessary they will either repair or exchange, probably for under $400, although shipping and insurance will add to that.
The engine knock does sound ominous, and rebuild or replace is expensive, but with all you have invested to this point it might be worth while. A used engine with warranty is probably $2-3K plus labor. Your mechanic sounds rather expensive, telling you everything should be replaced with new. You might want to try for a second opinion. But that also depends on where you are located.

 

Wow! That is quite a list. All that points first to VVT/cam issues. I would start with removing the valve covers and checking the intake/exhaust cam alignment. Both, since both banks are identified. You say cam chains have been replaced but were the tensioners and when? Many plastic tensioners have been replaced with another set of plastic tensioners which will also fail.

https://www.jaguarforums.com/forum/a...1&d=1385384319

 

Thank you guys sorry I have not checked this in a few days and the Tensioners were done by Jaguar of Great Neck NY in January when all the other work was done to it... I bought a used ECM that comes tomorrow I'm hoping I'm going to luck out and it will work. But the one issue I have is that knocking I really don't want to put another 3 K into this car that car is only worth 8 K in mint condition!!!!! and I have spend well over that all ready!!

Thank you again

 

If you install a used ECM you may need to perform an 'immobilization setup'.

All the modules on the CAN bus will need to 'shake-hands'.

Sometimes the car will start but if it does not, then you might need a PDU, WDS, IDS to get it going again.

bob gauff

 

is there a thread here somewhere, or could you post a detailed description of fitting a second hand ECU - and I don't mean undo 4 bolts and swap a few plugs. I have been told of compatibility issues - and key issuesfor a 1998 XJR
hey - Thanks if you can help
DC

 

I have an appointment with jaguar of south Hampton to 'reflash" the ECM but I was told that it might not work and that I might have to go spend 3 k on a new one but its worth the shot to save the money on the car.

 

Check out Automotive Scientific Inc. in Rogersville TN. Automotive Scientific Inc. Your #1 Source for ECU, TCU, ABS, EBCM, Climate Control and Speedometer Repairs.
I had my XK8 ecu repaired by them for under $400. It's a plug and play operation, no dealer computer time required.
All you have to do is disconnect the battery and remove the ecu. They will test it for $55, and if it can be repaired, the test cost is applied to the total.