My 2000 Jaguar is misfiring on all 8 cylinders. I changed the spark plugs and will change the coils. I was told that the other issues could be the fuel, camshaft or crankshaft position sensors. I checked the timing chain which is fine. So what else could it be?

Car starts and runs but sputters because of the misfires.

 

It is virtually impossible that all 8 ignition coils on one of these cars would go at once.

You cannot use a P0300 code to determine that you have misfires on all 8 cylinders. If you do you should be getting P030X (where X will be 1 through 8) codes and the check engine/MIL light coming on. All it takes is one cylinder misfiring for these cars to feel/sound/act like they're in their death throes. I've had three ignition coils die (one at a time, and at random) over the years and you know it the instant one does. You get horrible behavior from the car, almost instant "restricted performance" message, and usually the red alert light coming on. There are typically a number of codes, but if I get a P030X code I pretty much instantly know that I've probably got a bad ignition coil on cylinder X.

I don't have JTIS in front of me right now, but if you are having misfires on all 8 cylinders I'd definitely have the ECU that controls the ignition coils looked at first. I doubt that this is your issue, but one never knows.

 

Post your OBD codes. Did this occur right after starting ? Have the secondary cam chain tensioners been replaced ?

 

The codes I got were P0301 thru P0308 indicating all eight were misfiring. P1000, P1316, P1314 and P1642.

No, I haven't replaced the secondary cam chain tensioners. I will check them today.

 

Yeah, something is out of kilter. It sounds ominously like the cams have jumped time. You may be lucky and have no serious damage. I got to mine before it was too late. Many folks did not. There is a lot of info in the archives, but basically, there is a spot where the cam flats should line up, and looking at the secondary cam chain tensioners doesn't always confirm they are good. The cracks start on the blind side. Are you in Gainesville, VA ? Good luck !

 

The only good news in that batch of codes is the P1000, which is nothing but a status code, and it's discussed several times on these forums.

Something's definitely amiss. It's worth looking on these forums and the JCNA forums with regard to timing chain/tensioner issues. It is possible to save engines without replacing them in many instances.

If you end up looking for an engine donor send me a private message. I am just now getting ready to put my 1999 XJ8L up for sale. It needs to have front suspension work done but the engine is fine.

 

If the cam timing is ok, I would suspect the ECU, especially with that P1642 CAN token error. You might consider contacting Automotive Systems Inc Automotive Scientific Inc. Your #1 Source for ECU, TCU, ABS, EBCM, Climate Control and Speedometer Repairs, and send your ECU to them for testing. The charge is $55, and will be applied to the repair cost, if necessary.

 

Ok, thank you. I will have it checked once I replace the coils.

 

Would the ECU on my 98 Vanden Plas work for my 00 Vanden plas? Anyone know if this will work?

 

What I meant was that the problem may not be the coils, hence no need to replace them. My car had a misfire 0n four cylinders, but the coils were ok.

 

Absolutely agreed. It is virtually impossible that all eight ignition coils would have failed at once. This is also a very expensive "throw parts at it" approach in this specific case.

You should explore other avenues first given that it is so unlikely for the problem to be eight failing ignition coils.

 

In my experience coil pack failures throw a P35x code, where x is the cylinder number......
Since you do not have this code the coil packs are ok ...?

You have :
P030x - cylinder misfire
P1314 - misfire rate catalyst damage bank 2
P1316 - injector circuit IDM codes
P1642 - fuel pump monitor circuit high input


AndyP

 

Ok, I just had the coils changed. The car does run better but still not like it should. Could it be the fuel pump since I am getting the P1642 code?

 

When I checked the codes last week I came up with CAN token fault for your 200XJ8. I believe that fuel pump error is for XJR. Codes have different meanings for different models and years. That was why I suspected a ECU problem.

 

I am planning to have the ECU Checked. I have a new issue. Car starts but have to wait a few minutes before I can attempt answer start or it will not crank and run.