1999 XKR Convertible 4.0.

Hi All.

I need to change the Ignition coil packs and spark plugs on the Jag so I've been reading lots of posts about which make of coil pack LNE1510AB is best to use but I know less now than when I started reading.

the packs range from £10 to around £50 each is a fair difference, considering everything sold has to have a warranty are the cheaper ones really that bad and can the more expensive one really be that much better?

I know the quality of materials used in the parts is going to be part of the reason but I would love to hear members experience with the packs both good and bad?

cheers

 

I only change a coil if I must i.e. some behaviour mandates it (a code usually).

If you change several keep the old ones in case the new are rubbish.

I change spark plugs when they're due and use the OE kind. (Oh, and found they come out easier if still quite hot.)

 

I'm guessing you probably have the original Denso coil packs in your car, so 26 years service isn't bad. I doubt if the £10 ones will last that long, or that the supplier will still be around in XXX months to honour the warranty. I would just buy from a reputable supplier like SNG Barrat and hope for the best - not the cheapest or the most expensive, but at least they should work.

 

Don’t change the coils unless you have a fault with one of them. A used Denso coil from eBay, etc. is a better choice than a new aftermarket coil of dubious quality.

I don’t have a problem with aftermarket coils because I trust the experiences of forum members who have had them fail. These numerous shared experiences are enough for me to keep my purchases of electrical equipment to just the OEM parts originally installed whenever available, new or used.

 

Three years ago I had two coils fail in quick succession. Replaced one with Denso at absurd price from dealer, other with generic at half the cost. I then replaced all 8 with NGK coils and plugs and has run perfectly since. Check out NGK at Rock auto, complete set cost less than 1 Denso at dealer!

 

Thanks for the replies.

the car is misfiring hence why I want to change coils and plugs, if you advice not to change the coils unless I have an issue will changing all 8 coils and plugs cause other problems?

 

I would be wary of swopping all the coils to track down a misfire, as you would be introducing more variables.

If you have a P030x code indicating a particular cylinder, then try swopping the associated coilpack with another cylinder and check if the code changes.

 

^^^^ this !! ^^^^^

this is the traditional (and quick) way to determine if the fault is in the coil or the associated wiring. Five minutes work will point you in the right direction.

Z

 

Thanks for the advice. Before I do this I need to buy my own code reader as fed up of paying the garage everytime.

I was reading the coil packs should be changed every 100k miles, I'm guess you don't subscribe to that?

 

I can see no reason not to change them. At 100000 mi some things should just be changed out and plugs and coils are one of them.

 

Plugs I do change as per Jaguar servicing documentation (100K).

Plugs wear gradually. Coils always seem OK until they die (if they do).

 

A cheap (~£10) ELM327 clone with torque/lite or similar on Android or iPhone will give you the P codes.

Coil packs are NOT a scheduled service item (see attached from JTIS for MY99/00). They're also a lottery and/or expensive. I would not replace them on spec.

 

^^^^ this !!! ^^^^^

my coils are all originals. Current mileage is 194,500.

the main reason not to preemptively spend money on the coils while they are working just fine is that you have a car where something else, maybe something expensive, is going to die before long. Save your money and don’t buy a part that’s still giving good service. You will need that money later on.

And if you are lucky like me and get a car that’s unusually reliable, then spend your money on gas and frequent oil changes.

Z

 

maybe change wives on a scheduled basis. But not coils.

the coils are working just as well now as when new.

you can’t say that about wives (or husbands either).

 

Thanks for thr advice all, I'll definitely be following it.

well apart from Z's, not sure I could afford divorce.

 

ha ha !

that reminds me of a conversation a drummer had with that great American philosopher, Willie Nelson.


The drummer asked, “Willie, why is divorce so expensive” ?

Without missing a beat Willie replied, “Because it’s worth it…”

Z

 

brilliant 😀

 

I changed all 8 coils with the aftermarked part from SNG Barratt two years ago on my 2000 XKR. Still working fine. 40 USD each

 

want to sell any the originals ?

Z

 

Not sure that's the correct part number. Your car is right on the AJ26 -AJ27 change point for the XKR, make sure whether it is the 2 pin or the 4 pin you require.