Pop into your local ATS euromaster for a battery check.

Also, is your boot floor dry?

Sometimes water gets in by the rear lights and causes errors to show up.

I'm still going with the battery though.

My drive slopes slightly from left to right, and the boot used to let a small amount of water in. A ball of kitchen tissue near the battery showed how much water was getting in.  It was eventually cured just by making sure the seals were ok and making them a little more supple.

I actually had a quick look at the battery this morning. All seemed well, but again im not a mechanic and I do not have a voltage tester. I will double check around it to look for leaks etc. Would it be best to check after the rain?

Sor a hose pipe. Lay kitchen roll out in boot to see if it's getting in.

OK will do.

 

Had a pal look at my battery, it has a green indicator which says ok. Will still get it double checked.

 

Ordered the wheels, told the jag supplier on phone my new updates, He said my XK wheels are way out for my car and will def cause faults. and problems.

 

Delivery due on weds ... The mystery continues ...

Wheels changed tonight. Positive its made a difference, but I have yet to do major mileage. Although I did have Limp mode while in traffic. Idle started hopping from a steady 750 to below 400/300. I think that's when the limp mode kicked in. Would a dodgy battery cause the idle to behave like that? New Throttle body changed last week, and it was double checked a week later with a clean bill of health.

Dodgy battery can cause a whole host of problems!!

Hi Mannix, i can tell you that at work ( i work for jaguar) we are constantly testing cars that might have the wrong size wheels on being used as mules. This will not cause the problems that you have described and any so called mechanic that tells you this is the cause really ought to find another job. I would tend to agree with the comments above suggesting a battery problem first.

Thanks Mate, appreciate it. Major limp mode at the moment. New alloys on now. 7.5" 235/50/17's all round. Heading to halfords now to see if they can test battery for me. Will probably change it also, but would prefer euro car parts. Might just do it today so I'm ta done... So much grief. The car has been breaking my heart for 18months. Are you London based? Cheers Mannix.

In halfords, battery has 70% charge. Reading as good condition. Not recommending to change.

Wish I could post att. Pic of receipt.

Good, recharge

VoLts 12.29

Measured 615

Rating 900

Batt type regular flooded

Batt temp rabove 0

Told to give it a good run lol

Don't know if I am to late for this thread but I would change the battery, I had a Range Rover and the battery tested ok, changed it and all my problems went.

Not late. I was waiting for some positive feedback from someone. I think first opportunity I am going to euro car parts and hopefully buy the exact battery I need for my car. I can't do nothing else after that... Will be a one way ticket to the scrapyard if that fails.

Well with modern vehicles if for a few seconds they get 11 volts instead od 13.8 the sensors throw their toys out, a good heavy duty battery is not that expensive and if it cures your problems its cheap, might just be a bad earth but I stand to be corrected, Old Richard might put me right. I just know a bad battery on a Range Rover will bring up suspension faults, immobiliser faults and gearbox faults.

Thanks Jampot. It's makes total sense. Halfords confirmed it was a halfords battery. It's def about 2 years old but surely you would get more life out of it. Also, why has none of my previous specialists not picked this up?!?!?!

Mate don't know if it would be the same mine done it when I bought it I got it home put run a scan obd and came up a that a engine knock sensor my car is xj8 3.2 v8 2001 not sure if that could men anything to ya mine miraculously cleared delete code 247 still pops up no limp my model suffers bad with the corrosion

Hi chapman. Thanks for ur reply. Are you London based? Also are you a jag mechanic? Could really do with linking with some like minded people who know what there talking about and can help me finally resolve this issue rather than skimming me every time I bring it to a garage. Cheers Mannix