To my knowledge, there's no "check" to make sure the canister isn't clogged, outside of running diagnostic tests via SDD. As mentioned, all tests related to the fuel system passed. The tank was not dropped to swap the charcoal canister (it's not necessary) saving some labor hours.

I have the original canister sitting in my garage... If anyone has a confirmed bad one, we can both take measurements and compare results.

The specialist said this is a problem unique to NAS vehicles... But the only thing different on NON-NAS vehicles is the DMTL pump circuit, and fuel vapor exiting the system through the filler neck during refueling.


The right side port in the tank shown in Reply#72 is connected to a small tube that travels along the filler neck and vents the tank without restriction... Pointing to the LVS being the culprit for this problem.

It would have been nice if the specialist plugged the left side port and applied suction to the right side to see if air gets drawn into the tank via the fill port, but how many hours would YOU want to pay for a test to just say, "replace the tank".

Swapping a new charcoal canister is standard practice for the first step, with the lowest cost for labor and parts. Anything else requires the tank to be completely dropped, which means the drive shaft and everything else gets disconnected... It's a much bigger job than the charcoal canister alone requires. It was a gamble, and this time I lost.

 

Ah, I thought the tank needed to be dropped to get to the canister. It was mentioned in one of these fuel shutoff threads.

that should be about 1 hr of diagnosis but I get your point. It would have been nice if you paid for that test for us

And I really don't understand why Jaguar doesn't have a service document on this as it seems fairly common (at least here so maybe it's not all that common in the field?? )

 

also Traxtar, thanks a bunch for all these manual screenshots and diagnosis reporting!

So I've seen device, which I now know is the DMTL filter thanks to you, when I first started looking around at the problem but I couldn't get it off without risking breaking it. I was going to remove it and see if that helped with the fill up issue, assuming it was a clogged vent. I'll get back in there eventually but maybe someone ambitious can pop it off to see if the tank vents properly at fill up until then? Seems too easy...

 

Step 1 for me was to try & determine if the inlet check is valve sticking. So rigged up a funnel, theory being if the valve is sticking then fuel will back up the tube & overflow. The risk with this is overfilling the tank & flooding the evap canister, so I ensured the level was low enough. I poured 4 gallons down the tube as quickly as I could manage & it flowed freely. So this could be is a short term workaround for me, at the petrol pump.
looking at the photo of the evap canister it seems to have quick release fittings. Does anyone know how to release the fitting, do you depress the green tab? Also can the fitting to the tank be accessed without removing anything? If so I hope to disconnect & cap off the canister so air can’t be drawn in, but leave the tank breather open & try refuelling. That would rule out the canister, leaving just the separator in the tank.

 

I believe the fuel fittings all require a special tool to depress and side an outer ring, which releases the coupling.

 

Also when the specialist says the problem is unique to NAS vehicles, I have to disagree as I’m in the UK!

 

After ages of dealing with a 20 minute fillup due to constant clicking off at the gas pump......THE ISSUE IS RESOLVED I remember someone on this long thread mentioning they pushed the nozzle as far in as possible into the filler tube. That's exactly what I did and I have not had a problem since! (months ago) I hope this helps someone else on this forum.

 

As a final update to this... I purchased a used fuel tank on eBay and swapped it with my own. It fixed the issue.

No indication why my original tank wasn't allowing fuel in... Air flows freely through all the vent ports and the check valve where fuel enters at the bottom of the tank is fully operational.

I have a suspicion that the vent line was clogged the whole time, but no way to verify if that was the case.

 

I tried that but it didn't work. I'm selling the car. I pt way too much money into it. I hate seeing it go and I'll feel guilty not telling the next owner about the issue.

 

Owning a Jaguar can be challanging. There can always be the "last straw" when constantly investing money for different items, only to find new ones arising. As beautiful and fun our cars are, when things are going well, there can come a time, when ownership becomes overwhelming. I have felt this way a number of times, but have stayed the course. I'd suggest the best looking, relatively fun Asian car you can find for your next car, but unfortunately, you may always remember the Jag, even with all the problems. Good luck to you....It's a problem owning any semi exotic or exotic car.

 

I purchased a 2013 XKR and it has only one gremlin....it didn't come with the Navigation DVD in the player. The previous owner removed it for what ever reason. I bought one on eBay but it doesn't work. Oh well.

 

I'm curious what others have paid to change a fuel tank or drop it for other work, since that's the labor charge. Used tanks are about $300-350 shipped on eBay.

 

You know, this particular car may not have been maintained properly. I don't know. But I dumped more money into it than it's worth and will never see a return on it. I now have 97,000 miles on it and it needs to go before more gremlins pop up. Ba Bye!!!