I just recently purchased a 1997 Jag. XK8. It ran great for about 3 weeks. Then about a week ago, it started up great, I moved it out of the garage and let it run while I closed the door. When I got back it had stopped running. It would start up and run for about 3 seconds and then shut off. I had it towed to a independent shop who ran tests on it within his equipment's abilities. He seems to feel it is the ECM, the codes he got were P1367 and P1368. He is also concerned about possible security issues shutting it down, but he has no way of testing it. We are trying to decide which route to go. Remove the ECM and have it rebuilt and hope that is it, or have the car towed to the jaguar dealer that will not allow me to rebuild it, but might find something other problem, possibly with the security system.
My questions are, has anyone ever had these codes P1367 and P1368 and if so, was it the ECM or something else.
Also, would anyone recommend a ECM rebuilder. I found several on the internet, but I don't have any idea if they are reliable. Any and all help or suggestions would be greatly appreciated.

 

When my ECU failed, I had codes for coil failure on four cylinders and P1367. I sent it to ASI in TN and they tested it and confirmed that it needed to be rebuilt. The cost of testing was part of the repair, no additional charge. There have been no problems since then.

 

First check the small number of fuses in the engine management fusebox (where the ECM is located) and make sure the relays there have not worked loose from their sockets.

If all is OK, you can then remove the ECM. The ECM cover is easily removed. The most common ECM faults are caused by leaking electrolytic capacitors. If you open up the ECM and find corrosion, uneven brown stains or dampness, you found your smoking gun.

 

+1 on what WhiteXKR said. I had similar issues and decided it was the ECM. I removed it and opened it, and found leaking capacitors. Sent it to ASI for a rebuild, and haven't had any issues since (over 13K miles). It was well worth the (at the time) $375 cost.

Good luck!

-John

 

Remove a battery cable from the battery before pulling the ECM ! ! ! ! !

. . . or any other smart module.

 

Here is an interesting update. Before I posted this issue, my mechanic stated that with these codes P1367 and P1368, it points to the ECM, but he had a gut feeling that it might be the crank sensor, so we decided to buy a used/good sensor and try that, cheap fix, if it worked. He installed the sensor and it still did not start. Then I posted the problem.
Yesterday, before removing the ECM, my mechanic decided to check and recheck the ECM and codes. He decided to erase all the codes, which he did, then a message or something came up stating synchronize the camshaft and crankshaft. He did something with his computer and low and behold, it started right up. I haven't spoken to him in detail yet and he admits, he's never seen this before and he's not really sure what was wrong, but he got it to work. When I pic in up and get all the details of what and how he did it, I will let you know.

 

emi spikes can do this.

Have your battery and cables tested. Check the power nut in the driver side fuse box, be sure it has not come loose,and check the ground on the passenger side transmission area, if its green, its burnt up.


If all passes, your ecm may still be on its way out, and last thing you want is for your car to cut off while driving and you crash.

 

Do you have a picture of better description of the ground area by the passengers side transmission. I've checked everything else, but I'm not sure of the ground area or what I'm looking for. Thanks

 

Check out the electrical link in my signature, it has the ground strap and other common issues listed.

 

Thanks for the great pictures and information. This will help me greatly.

 

Check the grounds and the battery. You say the codes were cleared and it started but when you cleared the codes did you do a hard reset? With the idea that the car started and then shut down also leads me to a fuel problem. I would check the fuel pump pressure and fuel filter they can cause the same problem.

I see that a procedure was provided to you with a no start issue and I do not wish to take away from that but I will provide another link with additional information from my page that might help with your problem.

Link JagRepair.com - Jaguar Repair Information Resource