Hi guys,
This is my first time posting on this forum and I am admittedly somewhat ignorant of jaguars.
Despite my ignorance a little over a year ago I invested in an 07 XKR and up until recently it has served me very well and has been very well looked after.
​​​​​My problems began around two months ago when it developed a significant coolant leak from a reduction hose in the valley. It was diagnosed and repaired by a reputable Jag specialist and all was well. However a few days later it failed to start again after returning to it after a brief shopping trip, which as quickly diagnosed as a charging issue. After that the alternator was replaced.
Upon collection it immediately started to misfire and was returned to the garage (total journey was probably less than 300 meters). The garage say it will no longer start and have suggested that it may have jumped time because of a cam chain tensioner failure.
My question is, could there be another reason? It ran fine for around 100 miles after the coolant leak. I'm thinking a compression test is the first port of call.
Thanks in advance for anyone willing to help me.

 

Welcome to the forums Tommy,

I've copied the question from your Intro for advice from members with the same model.

Graham

 

"Charging issue" is usually battery or alternator. They changed the wrong part.
"Second no start", probably a carry over from first problem, THE BATTERY.
Get a battery maintainer.
When you say no start. Does that mean the engine turns over but doesn't fire up, or the engine doesn't move?

 

Hi Sony,
First of all, thank you for replying.
The battery issue was rectified (pardon the PUN) with a replaced alternator, at least to a point where charging could resume while the engine was running. When I drove it away from the garage after the alternator was replaced this issue first occured. It immediately stopped firing on a lot of cylinders, I'm only guessing but I'd say at best I was down to 4 (but probably less). I immediately returned it and a couple of days later I received a phone call informing me that it would no longer start and they suspected it has compression issues. They went further in their unconfirmed diagnosis and suggest that the cam chain tensioners may have failed causing it to jump time. My confidence was lost at the point when they offered to buy the car under this pretense.

 

They disconnected something to the point it'd fail eventually. That eventually was quite quickly. Either by ineptness or by crook. Too many shops do this to too many people to rip them off. Maybe your shop is legit, but boy oh boy what you state sounds way fishy.

 

It does seem very, VERY odd doesn't it. I've had a think about checking the replay for the fuel pump. I'm far from an expert but I think that wouldn't be a bad bet.

 

My apologies, it didn't fail to start when it had the coolant leak. That was misleading because I accidentally used the word "again". It's started and ran fine with the leak. 🙄🙄 Sorry

 

"chain tensioners" failed on the XK8 models but not on 2007s.
At this point I would bring the car home and find mechanics that do house calls, for a convincing diagnosis.

 

Thanks for your advice Sony. I shall do just that. I've told the garage in question to carry out no further work on it. It's been sitting pretty on their lot for some time while awaiting work. Can't help but think it may have caught the wrong type of attention. I'll get it looked at properly and if you're interested I shall update this threat on the outcome. Thanks again for your support.

 

Yes it could be fuel starvation. Fuel not leaving the tank or injectors not getting enough PSI.
Have the area around the alternator, and injectors, checked for disconnected wiring.
At home, have a battery charger hooked up. The starter will be used a number of times by the visiting mechanics.
I wish you well.