I have an XJ8 Van den Plas 1999 model standing in a garage in Euclid Ohio with an engine problem. I had to get hold of a used engine from Texas to be reinstalled. After doing that I got this message from my service guy and I was wondering if someone can help me?
Do you know what year this motor came from because it is missing a can sensor on the right bank, it fires and stalls. Set code p1340 for cam position bank 1. When I look for the sensor there is none. It also set a code for oil temp, it doesn't have that sensor. If the place you received the engine has the Computer for that car, we might be able to install it. I am looking in to see if I can reprogram this computer(probably not).

 

Here is some Wiki information , for what ever accuracy it is worth . You will see that the original 1999 engine is a AJ26 from the original Jaguar AJ26 design and somewhere ( I don't recall where ) the engine series type identification stamp is

Info on engine ECU :

https://www.jaguarclassicparts.com/u...control-module incomplete information

Info on sensors :

https://www.jaguarclassicparts.com/u...s-4-0-litre-v8

More Info :

https://www.jaguarforums.com/forum/x...options-74547/

There is a possible difference between North American and Rest Of World ECU's

 

search the forums for installing an AJ27 engine into an AJ26 car, you'll need to reuse the old cam with the position sensor on it to make it work, and probably some other things I'm not remembering. Although if the original engine was an AJ27 and the donor engine is an AJ26 then it will be much more difficult. It sounds like the second possibility is the case due to this:

 

Thank you so much for you reply. So this means that I have to get hold of a A27 engine instead, right? An other question are there different throttle bodies on these engines?
It seams that mine has an air assist version. When I look for new engines which years can I use? 4,2 also?

Best regards Tom

 

Forgot to link this :

https://en.wikipedia.org/wiki/Jaguar_AJ-V8_engine

 

Your original motor in your car is an AJ27. It sounds like you bought an AJ26, probably from a 98xj8 or a 97-98 xk8. If somebody told you that this motor would be a simple drop in an go, they were wrong.

The AJ27 has cam position sensors in both heads. The only way I know of fixing this is to have the head machined or get an AJ27 head.

The AJ27 has 2 sensors in the oil sump. You would need to take the sump from the AJ27 and install it on the replacement motor. This would require removing the motor.

The throttle body is different and I think the flywheel also.

Changing the ECM is not an option. The different modules communicate with each other and if you put an AJ26 ECM in I think it would cause more problems. I not real knowledgeable on the electronics but that is my understanding.

It would be less expensive to remove this replacement motor and get an AJ27. Not positive on the years but I think AJ27s range from 99-01 in both the xj8 or the xk8.

The simplest way that I can tell the difference is on the AJ27 the VVT is in the cam cover and on the AJ26 they are in the timing cover in front of the heads.

 

You can fit an AJ27 engine into an AJ26, we've done it. Contact Sean B on this forum and ask if he can recall some of the more technical detail.

 

Stu, I believe his original motor was an AJ27. Trying to make an AJ26 into an AJ27 is a lot more work. I think it is cheaper to get an AJ27 rather than rebuild his AJ26. Labor and cost of gasket set.

 

Hate to say it Stu but both cars were AJ27 - that's why we went for it!

I'm with BobRoy on the issues mentioned. If the two engines were sat side by side it wouldn't be difficult, and a lot of early nikasil equipped cars had this swap, but again engines together at the dealers and supplied as short motors. I would go with sourcing the correct years type AJ27. And yes you could go 4.2, but you would need the XK8 version as they're on similar systems - it widens your choice, and as long as you have your original motor...

 

Was it!? It's been a long time and I've forgotten a lot since then, I thought it was AJ26 because it was a 99 car.

 

If your car has the upgraded AJ27 engine there is a stamp somewhere on the engine I saw once . This would negate the need to swap out the ECU

 

i'm live 30 miles west of CLEVELAND,OHIO.i there's a salvage yard out here that always has a wide selection of jag parts.i hope its okay if i post his phone# as i have bought several jags from him.MAMMOTH automotive 440-233-0234

 

Note the part number of your current engine ECU of your current engine and determain the current series AJ26 / 27 ( as RobRoy noted ) for ease of swapover