hello, my XK8 two weeks ago begun to fail, some moments works fine the other only 4 cilinders, I changed the spark plugs, the rabble, and coilovers, but the problem maintains itself.
the amber ligth apears,message:engine fault, pour veicule perfomance
I turned off the battery overnight and in the morning and worked 8 cylinders for one minute then returned to fail 4 cylinders.
some moments works fine, and other moments not.
the error in computer go to coils B C E H

Any idea?

 

First thing we need to know to be of help is what year XK8 you have.
Second what are the code numbers showing up when you pull the codes.
If it is showing bad coils for those three cylinders then take the B coil and swap it to a different cylinder and see if the misfire changes to that cylinder. If so then the coil is bad. If it doesn't then you should check wiring/connectors for contact, breaks, shorts and worn insulation.
It is also important that the battery be in good condition and fully charged. A weak battery causes all kinds of problems.
This should get you started, get back to us with results.

 

Thank you, the engine was replaced in 2000 by Jaguar Warranty, the battery is new, 11/2015 Varta brand.
I've tried changing the cylinder coils and coils are ok.im looking to acquire an OBD2 that really works in the jag, already bought one that does not work.
any air leak make a problem like this?
tanks

 

Early cars with AJ26 engines had two coil drivers, one for each cylinder bank. The drivers are mounted on the fire wall close enough together that you can swap electrical connectors. If the problem moves to the other bank then most likely the driver.

Yes, year and model would make analysis and response much easier. Post that information in your 'signature' line and you will not have to think of it again.

 

Hello guys, the codes of my XK8 is P2100, P 1300, C 1155 and u 2012.
what is the problem and what i need to change/repare?
tanks
Carlos

 

Carlos,

Model Year is important information when troubleshooting error codes. Your profile show XK8 -1996 so I've added this to your forum Signature. It will appear automatically with your next post.

C1155: Wheel speed sensor circuit left front electrical failure

P2100, P1300 and U2012 are not Jaguar defined codes for your Model Year. What type of code reader are you using?

Graham

 

its a 4.0 from 12/1996, motor and gearbox changed in 6/2000 by jaguar warranty.
i used the code reader -LAUNCH X431 CREADER VIII OBD2 HANDSCANNER

Tanks
Carlos


Launch X431 CReader VIII OBD2 handscanner - AutoWolf.nl

 

That code reader is giving odd results. Not unusual with Jaguars as many code readers are not compatible even when the manufacturers claim they are.

Misfire codes are in the P0300 to P0308 range.

Graham

 

hi, after change a lot of things, coils, spark plug, and others the problem was very simple...fuel filter,i change the fuel filter , alongside the rear wheel on the left. No more fails or mistfires , now my V8 works like a clock...
Tanks to all for the help