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I thought I saw a thread dealing with this but can't find it.
I have no problem getting fuel to a little over the half tank level, but then then I can only continue at a trickle or the pump shuts off. If I wait 30sec. it will take another half gallon, but it takes over fifteen minutes to fill the tank that way.
I know there is a large vent pipe that runs from the top of the tank to the filler neck, so it doesn't seem possible that tank is pressurizing. Diagram for SC model below looks the same as NA tank.
I had the same problem on an XJ40 (which is essentially the same) some years ago.
What I found was that changing the angle of the filler in the neck helped to fill normally. What I mean is I used to hold the pump filler so that it was parallel to the line of the car front to back, rather than perpendicular to it which would be normal.
Also not inserting the filler as far as it would go, but only as far as needed to stop splashing helped.
Yes, I tried both of those yesterday. By waiting about 30 sec. I can get more in, but then it shuts off again. Holding the trigger so that the fuel is barely moving helps, but that's a boring job.
It seems to have gotten worse in the past couple of months, and a couple of years ago I didn't have a problem at all.
refueling problem...what's that pipe into the filler?
Hi, I am progressing the problem via chasing a new Rochester valve. Not successful yet, but I will get there soon. Whilst idly gazing into the fuel tank area, I realize that I don't know what the steel pipe that comes off the filler neck and goes back into the tank in front of the vapour expansion hump...actually does?
Dumb question I realize, but when I know that it has nothing to do with the abysmal refueling problem; I will sleep easier.
Many Thanks
Charlie
p.s I hope I posted this in the right place.
Gas is being poured in down the neck, the air in the tank (being replaced by fuel) has to be able to vent out somehow, so it travels through this tube.
From what I've been able to gather from reading others , some of the X300s have a anti - siphon trap in the fill neck / tube
This is different then the smaller diameter fuel nozzle spring trap door at the top of the fill neck
Mine does not have a anti - siphon trap and having one may be country law dependent
I don't think once the trapped gas pressure either positive or negative should have anything to do with filling with fuel once it has equalized
The question is how do you test for this anti - siphon feature ? I was able to feed a 1/4 inch tube to the bottom of my tank and that may or may not be a valid test
But is a cheap and easy test
The anti - siphon device if present in your car may have failed
so just cam across this as i have noticed on a couple of ocassions i have not been able to fully fill my tank.
well i assume not.
after filling it reads only 3/4 and i would have thought i need more petrol than it took.
now i see the TSB here which state there could be 2 issues.
one is replace the tank and the other is replace the sender.
now obviously being harder to get new replacement parts the question is, is there anything that one can do to get around this and fill the tank fully if it is infact not filling properly?
is there a way one can actually check and test if it is the fuel sender reading only 3/4 when the car is infact full or if it is the tank not filling beyond 3/4?
and if it is the sender do i need to remove the tank to replace the sender or is there enough room to replace it from the top? (without cutting the parcel shelf)
From my experience, the fuel filler on the XJR can be finicky. Just another Jaguar oddity for us to get used to.
The comments by B1mcp are particularly pertinent.
I have recently completed over 2500km to outback NSW Australia with my small caravan in tow, yes, a rare sight for a Jaguar, and completed many refills.
A careful approach is required, the nozzle angle should provide adequate air escape and flow rate can impact also, plus the petrol station fuel nozzles present a problem.
Unfortunately, we have a combination of a finicky fuel filler and Petrol station nozzles that are not in good condition/adjustment. I usually have a rough idea of my fuel required when filling up and often persist past the pump clicking off.
I have noted over my 12yrs of ownership the state of the servo pump nozzles. I have had many occasions when I have had the pump repeatedly clicking off right from the start. I have subsequently given up, driven a couple of km up the road to another petrol station and filled up with not a problem. The condition/adjustment of the nozzles is very incontinent and a delight when you strike a petrol station pump/nozzle that just fills the tank completely with no issues.
10-29-2015, 03:22 PM
Refueling problem
