S type 2004 4.2 v8
Hello
on the way home from a long trip
We stopped for a rest
as we were ready to leave started the car then
Then the **** hit the fan
Took a while to start then would not idle
Then got restricted performance on cluster
but that went away once car got up to 90km/h
Managed to get home
NO ENGINE CHECK LIGHT
Got these codes
PO300 RANDOM MISFIRE DETECTED
PO301 CYL 1 MISFIRE DETECTED
PO302 CYL 2 MISFIRE DETECTED
PO303 CYL 3 MISFIRE DETECTED
PO304 CYL 4 MISFIRE DETECTED
PO305 CYL 5 MISFIRE DETECTED
PO307 CYL 7 MISFIRE DETECTED
PO308 CYL 8 MISFIRE DETECTED
P1316 INJECTOR DRIVE MISFIRE DETECTED
BO300 NETWORK MANAGEMENT EXPULSION

ALSO DID COMPRESSION TEST
CYLINDER 1 TO 6 ARE 11.5 OR AROUND 165 PSI
CYLINDER 7 AND 8 HAVE NO COMPRESSION AT ALL
I THEN PUT TO SPARK PLUGS IN 7 AND 8
THEN TURNED ENGINE OVER IT SPUN LIKE THERE WAS LIKE NO PLUGS IN IT
Please any help would be appreciated
Thanking you
Darrol

update
Did a cylinder leak down test on all cylinders
1 to 6 are great
7 & 8 have bad intake valves so had air coming out of throttle body

as i am in new Zealand i can not find any gasket sets
phoned 5 auto parts stores today even time got the same answer
no gaskets for that csr
Would anyone be able to tell me where i can get the gasket set. Thanks

 

If your sure that 7 & 8 have no compression I would start removing parts to see what's wrong before ordering anything? Gaskets are on EBay if you search but not sure how much shipping is to you in NZ?
Sounds like you might need a new engine? Has the engine been over heated before? Seems strange to lose compression completely on 2 cylinders.

Maybe do a coolant test to check for combustion gasses before you proceed?
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Maybe bent valves Take valve cover off. And spin by hand to check

 

[QUOTE=clubairth1;2556707]If your sure that 7 & 8 have no compression I would start removing parts to see what's wrong before ordering anything? Gaskets are on EBay if you search but not sure how much shipping is to you in NZ?
Sounds like you might need a new engine? Has the engine been over heated before? Seems strange to lose compression completely on 2 cylinders.

Maybe do a coolant test to check for combustion gasses before you proceed?
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Hello after taking intake off have found last two intake valves on cylinder 7 & 8 have lost there valve seats
yes engine swap would be quicker but unfortunately i can not find a 4.2 for sale in new Zealand
I am just finding that i am hitting a brick wall on Ebay
When I asked about gaskets i get the same answer
Sorry not Compatible with your car or sorry dose not fit your car
i though there were other jaguar that had the same engine
but im getting nowhere
thanks

 

Super bad luck on the valve seats. Can you use a local machine shop to fix them? Or are you looking for different heads? This is not common and I think I have heard of it maybe once before? Engine ever get over heated?
Yes you are right all 4.2L engines are the same across the Jaguar line up. Now the SC version did pick up VVT for 2006 as before that the SC engines did not have that. But you have the NA version so you don't need to worry about VVT.

Here is a listing for head gaskets and valve stem seals?
4.2L V-8 Head Gasket Kit
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use 2004 xj8 to look for parts on ebay

 

 

M8 if it's any help I've found it way cheaper to get parts from Oz than Nz. Online auto parts Melbourne have been brilliant. Going to try Berkshire Jag parts england next.
best of luck

 

Hi Darrol,
I have sourced parts for my Cats from all over the world, but this is one of the good sources:
https://www.britishparts.co.uk/class.../engine-v8-c25 (That's already the link for your V8 engine).
At least you would have it easy there to find the P/N of the parts you need, and even, if you don't want to buy there, you have the P/N to search the rest of the net with that number.

You have some serious problems there. Just mentioning anyway, that my V8 (XJ8) was in restricted performance when I bought it, but my OBDII scanner told me correctly that it was the knock-sensors...