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Two small screws on the bottom edge of the rear seat before you yank.
But, I don't think there is any fuel venting back there. I thought the "Y" was under the car near the differential. Others more knowledgeable than me will chime in.
Um, what you're thinking of, Jeff, is the Fuel Line 'Y' which is indeed Under the car just forward of one of the tanks (which one probably depends which side the steering wheel is on, the Y will be opposite--Maybe).
Randy is asking about the Vent System which runs up the C-pillar under the upholstery.
(';')
There is a "breather" of sorts that runs up into the "C" pillars on either side of the rear windscreen. My fuzzy understanding is that this hard-line makes a high spot in the line that goes to the charcoal canister in the right wheel well. It separates raw fuel from running up into the canister. I don't know if it is the cause of your problem. If you pursue in this direction, you will also have to remove the curved panel on the cabin side of the C pillar (I know there is a Jaguar name for it, but it escapes me just now).
The time delay thing just bit me again. When I started a response to Randy's question, there were no other posts after Jeff's. When I finished and posted my comments, Elinor had beat me by 10 minutes with her post. I swear Elinor, I was not plagiarizing your response, it must take a certain amount of time between the "poster" posting and the rest of us reading it.
In this illustration item #3 is (I think) the vapor pipe that runs left-right across the body near the top of the rear suspension cage. It's behind the large heat shield panel
The time delay thing just bit me again. When I started a response to Randy's question, there were no other posts after Jeff's. When I finished and posted my comments, Elinor had beat me by 10 minutes with her post. I swear Elinor, I was not plagiarizing your response, it must take a certain amount of time between the "poster" posting and the rest of us reading it.
Dave
Not to worry, Dave, that happens quite a lot in here actually.
Great minds in the same rut, I say.
(';')
There is a one way check valve about a foot before the charcoal canister inside the right front wheel housing. Remove it and drill a 1/16 inch drill bit right thru the center of it. reinstall it and see if the condition returns.
If you read my original post I have convinced myself that is not the issue because only one tank has this issue. That is why I suspect the issue is between bad tank and underbidy Y split
Worzella, I did indeed read your entire post but I have personally fixed a few cars of my own with your similar condition. It won't hurt to try. Shown below in a attachment is drawn picture from the Jaguar parts manual. Find one end and travel to the other end to find your crimp or damaged pipework.
Hi Randy,
The small hole inside the filler neck that goes to the vapor line connector might be clogged ( hole is in neck right below the hinge for the lid ). I used a piece of old electric guitar string to clean mine ( the strings also work great to clean small engine carbs etc ). I can't remember the size right now, since I always have a bag with an assortment and just use what fits !
Easy to clean and might fix the problem. It might also be a damaged / pinched vent pipe in the fender well, I'm posting a picture with the IRS and the cover that protects the fuel return valve removed. The vent pipe is the one conveniently mounted across the rear of the well to catch rocks and other road debris !
As I understand the vent system, While running, As the volume of fuel goes down the volume has to be replaced by air so as not to cause the fuel tank to implode. Mid 80's Jaguar XJS's did this on frequent occasions. A one way check valve between the charcoal canister and the fuel tank could and would stick closed and the fuel tank would get pulled flat. You might hear a slight woosh while opening your cap, ( Opening your beer can woosh ) As a example but not WOOOOOSH. The Woosh sound that Worzella is describing from one tank only is the sound of air rushing in. Or the tank is going to a vacuum while running. Here is a question for Worzella? Is it the left tank that makes the noise or the right tank?
I had the same problem with my car which is UK spec with the vent to air near the diff. The blockage was in the section of steel pipe in the wheel arch, which had gone rusty. (The one in the picture in the earlier post). I replaced the section of pipe with a new one which I made up from brake pipe. It just connects via rubber hoses to the sections before and beyond.
Does anyone know why they designed it like that with the loop around the wheelarch instead of just taking the most direct route?
I had the same problem with my car which is UK spec with the vent to air near the diff. The blockage was in the section of steel pipe in the wheel arch, which had gone rusty. (The one in the picture in the earlier post). I replaced the section of pipe with a new one which I made up from brake pipe. It just connects via rubber hoses to the sections before and beyond.
Does anyone know why they designed it like that with the loop around the wheelarch instead of just taking the most direct route?
Sorry for resurrecting an old thread but this was closet i could find for my question when I searched. I am replacing these vent pipes as they are a pile of rust and was wondering, can you just cut these pipes where they enter the rear wheel arch on each side and let them vent there? They just route along the top of the diff anyway into a T joint and a pipe branches from it and vents under the car. Or do these pipes need to be joined for some reason ?
Hello Crankmaster, On a North American spec vehicle the "T" piece would collect the vent to the Charcoal canister from the two tanks. Your car does not have the pipework to a Charcoal canister. But it has the vent from the two tanks to the atmosphere.
Hello Crankmaster, On a North American spec vehicle the "T" piece would collect the vent to the Charcoal canister from the two tanks. Your car does not have the pipework to a Charcoal canister. But it has the vent from the two tanks to the atmosphere.
Thank you.
Larry Louton
Thanks Larry, So technically there is no reason why the pipes cant just vent into the rear wheel arch on both sides?
Access to fuel vent pipes
