Fuel Leak XJ6 Series 3
#1
#3
Two possibilities that happen to me:
- Fuel pump started leaking from the housing
- Fuel tank changeover valve got stuck causing the gas return to only go to one of the tanks despite the tank switch selection which resulted in an overflow condition.
Both of the above in the trunk.
In the front, I had one of the fuel injector lines rub against metal which eventually caused the rapture of the hose. Now that was scary.
- Fuel pump started leaking from the housing
- Fuel tank changeover valve got stuck causing the gas return to only go to one of the tanks despite the tank switch selection which resulted in an overflow condition.
Both of the above in the trunk.
In the front, I had one of the fuel injector lines rub against metal which eventually caused the rapture of the hose. Now that was scary.
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Jimmysea (02-24-2015)
#5
if you can hear the tank(s) "contracting" when this happens, (sort of a metallic sound as the vapor is released when you open the gas filler cap), it means that fuel vapor pressure is building up and expanding the tank walls, eventually this expansion-contraction makes the tank(s) start to "stretch" the tank seams beyond their limit, and the tank starts to leak.
since you are smelling fuel, one of the tanks is suspect if no leaks are found inside the trunk. Check under the tanks for any gasoline stains.
To resolve the whoosh vapor pressure buildup once and for all, find the check valve by raising the front passenger side of the car so the tire goes down as far as possible;
look at the inner wall until you see a black plastic check valve similar to the one in the picture below attached to the wall and connected with rubber hoses on each side;
pull the check valve from the hoses; Take a 1/8" drill bit and push it through either hole in the valve, pulling it out the opposite side hole; Reinstall the check valve observing that one side goes to the larger diameter hose.
This will eliminate the vapor pressure buildup whoosh forever, yes the car will pass inspection, no it will not affect the engine performance.
Last edited by Jose; 02-24-2015 at 06:34 AM.
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Jimmysea (02-24-2015)
#8
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As does my 83. I merely plugged the line from the GM canister into the LT1's purge valve. Works just fine.
I have a spare canister that came with my "engine package". It looks amazingly like the
one in the Jaguar. The hose hook up diagrams are close, but not quite.
The filler lids on my car are far from fume proof.
Carl
I have a spare canister that came with my "engine package". It looks amazingly like the
one in the Jaguar. The hose hook up diagrams are close, but not quite.
The filler lids on my car are far from fume proof.
Carl
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Jimmysea (02-24-2015)
#10
And onward..
Found the evap valve behind the rear wheel, having difficulty getting the clamps off, but I will persevere.
Question:
1. When I do get the hoses off the Fuel Vapor Pressure Relief Valve , should fuel be coming out of either hose? I have the system depressurized.
2. What is the unit next to the fuel pump at the rear of the spare well, that looks like a motor, and has a drain hose?
Also, found my leak at the tank switchover unit, but will have to drive some as I have 2 full tanks, and probably need to drain them somewhat to get that unit out no? The hoses don't look to be too easy to clamp off without damage.
All help really appreciated...
Question:
1. When I do get the hoses off the Fuel Vapor Pressure Relief Valve , should fuel be coming out of either hose? I have the system depressurized.
2. What is the unit next to the fuel pump at the rear of the spare well, that looks like a motor, and has a drain hose?
Also, found my leak at the tank switchover unit, but will have to drive some as I have 2 full tanks, and probably need to drain them somewhat to get that unit out no? The hoses don't look to be too easy to clamp off without damage.
All help really appreciated...
#11
behind the rear wheel? clamps?
hold it! that does not sound like the check valve I'm talking about. I meant the one located in the FRONT passenger side wheel well.
no fuel should come out when you disconnect the hoses from the valve, only vapor from one side if you did not open the gas filler cap while disconnecting it. If fuel is coming out, you are disconnecting the wrong valve.
hold it! that does not sound like the check valve I'm talking about. I meant the one located in the FRONT passenger side wheel well.
no fuel should come out when you disconnect the hoses from the valve, only vapor from one side if you did not open the gas filler cap while disconnecting it. If fuel is coming out, you are disconnecting the wrong valve.
Last edited by Jose; 02-24-2015 at 05:56 PM.
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Jimmysea (02-25-2015)
#13
#14
Go to: XJ6 / XJ12 How To quick links here in this forum to download the Factory Manual for the Series 3. It's free.
post a picture of the item you are referring to, if I don't know someone else will. you have a 1983 which is very similar to my '84 built in Sept. 83, but I can't visualize the part you are referring to. Thanks.
Last edited by Jose; 02-24-2015 at 08:42 PM.
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Jimmysea (02-25-2015)
#15
#16
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My charity for the Haynes would be the brown can that my waste servicer company picks up. Paper, glass tin, alloys, etc. for recycle.
Or, as one has suggested, to correct the wobble on a table that is too short.
Actually, it does have useful stuff. just hard to find as the "organization" is awful
The series 3 stuff is just "jammed in" as an insert, sorta.
Or, as one has suggested, to correct the wobble on a table that is too short.
Actually, it does have useful stuff. just hard to find as the "organization" is awful
The series 3 stuff is just "jammed in" as an insert, sorta.
#17
#19
I use a product called "Hylomar" used in racing cars to seal gasoline hose connections.
#20