I have a 2000 xkr I bought a year ago the person told that the tensioners were update as the water pump, I am getting po codes of 301,302,303,304 on tech. told me it ws the tensioners Iam no sure he said that side jumped a tooth on cam Any help would be great i have all about the tensioner updates

 

a jumped tooth maybe the cause but a bit more history might be in order. You bought the car a year ago, has it driven ok before this occurred without any codes? Were they present when purchased? Did they recently come on?
It might be a case they didn't tighten the coil packs, or put in the wrong plugs. Or they may have loosened a connector for the injectors. These are all easily checked before you need delve into the cam alignment. IF you to pull valve covers you can rotate engine till cams 'FLATs' new front by gears are aligned, flat part facing up, use a straight edge and ensure they are in sync, otherwise you might need to perform a alignment, Search the forums there are some entries on this, requires some tools but some folks here maybe willing to lend them to you.

Good luck and btw, Someone will be by shortly to ask you to introduce yourself as a first poster. Check the stickies on the top of the forum on new members and again welcome, you will find many questions answered here by some pretty sharp folks that know jaguars.

 

Howdy Neighbor,

I'm not to far from you here in Damnville. Hopefully its not the tensioners and the previous owner didn't lie about them being replaced.
Mine got missing codes all on one side like that when I got it and it turned out whoever replaced the plugs last only put half the screws in that hold the cover on over the coils and enough moisture had gotten in there to cause the misfires. It even rusted up the metal cores on the coils. I cleaned it all out and rebent the springs on the coils and put some dielectric grease on the boots where they meet the plug and coils. The problem has never come back. Hopefully its something that simple.


Dave

 

Thanks for the responce. I talked to a tech. whichs does 80% of his work on Jag. tensioners and he said he didn't think it was that at all, He said said that he has never seen a super charged v-8 skip a tooth period. He said check fuel filter , then oil getting on to spark plugs, I didn't think it was the tensioner because it runs smooth as a button going down the road. Just started the last couple of months getting worse because i am letting it warm up that's when the idle gets rough and I start getting the codes, I will post and let everyone know what I find. thanks

 

Agree, check for moisture or oil on the outside of the plugs. Oil means you need new valve cover gaskets. Water means the coil covers are not keeping water out from the hood vents or the engine was washed.

Once this is checked out, if you still have the codes, clear them. Then, while the engine is still hot run the car for just a few seconds and see if one code comes up first. That code would most likely be pointing to a bad coil.

 

Don't mean to jump in from the X308 forum, but I strongly suggest you pull the cam cover and confirm that your car has the third generation tensioners. It is unlikely that all coils on the right side went at once or there is oil in all 4 plug receptacles. We missed this signal on a X308 last week: the chain jumped one slot; and codes showed bad coils on one side.

 

Well i just pulled all four on passenger side coils and replaced plugs, the coil packs had rust on them pretty bad, I cleaned the coil springs and ends with scotchbrite , I didn't see any oil in cylinders just a little around treads, cleaned everything and fired her up, first I got a po 304 and 308, i drove to the store and back let it idle for five mins, and right now i am getting po 301. 303, 304 , I have cleared the codes two times , It still runs great going down the road also changed fuel filter, thanks again for any help. i'am thinking coils or injectors, Chuck

 

swap the coils to the other side, if the problem goes to the other side, replace the coils.

If the car runs good, it may be off a tooth, this is easily fixed by lining the flats back up for both sides, the cam(s) that is not flat with the non misfiring bank need to be lined back flat again one tooth/ corrected, easy fix.

 

I hope this is not a stupid question just wanted to make sure that the passanger side is po 301 303 304 thanks

 

Yes it is.

 

These are original codes I had at the beginning. If it were the timing shouldn't it be all four? thanks again

 

Also if it were the coils would it still run rough during normal driving? I wondering if is the injectors thanks again

 

Quit screwing around and pull the cam cover on the right side. You have a jumped tooth.

 

Well I pulled all four coil packs out and pulled each spring off and sanded the area where they made contact, no more misfire codes, wanted to know what is the best injector cleaner is thanks to everyone

 

BG44K is probably the best. I just ordered two on ebay for $32 free shipping.

 

well I found out i have old tensioners, Put new ones on But when i line the flat spots of the cam up on drivers side where you can put a level on them the passengers side is about a have of a tooth off, I can put it one tooth clockwise or ccw and the side will not line up the two flats spots on the cam. It's about a half of a tooth off.. I don't know if the sprocket can be moved a little on the cam or if the chain is stretched real bad it doesn't look like that any help would be greatly appreciated Chuck

 

Are you using the zip tie method?

 

I just found out that the drivers side flat cam spots will line up perfect but the passagers side flat spots should be pointing in towards each other just a little. I just read this on another kink

 

My cam was out one tooth on passagers side the flat spot was point outward insead of inweard

 

I used that on the drivers side because it was already correct. the passengers side i use whit out and marked the chain and sprocket and then moved it thanks