Hi all,

There is another thread on this but I wanted to ask in a new thread with my details,

About a year ago, I had the old gas pump shutoff problem after about every 2 seconds of pumping. I've been down this road before on an old Hyundai and it was the carbon evap canister. On that car, I just disconnected the vent line.... Anyways, when I had my oil changed on the XK in April, my local guy had a look and didn't see anything. All he did was poke around the vent lines. Surprisingly, the "nothing" that he did fixed it... For a while... Now it's back.

Since it was "fixed" without changing anything, I don't think the canister is clogged. Plus, we never overfill the fuel tank so I wouldn't think the canister is compromised. So assuming a vent line blockage....

I went under there and banged on the hoses that I could see and reach but it didn't help. The service manual says to clear the line from the canister to the tank but I can't get up there. Maybe if I can get it on a lift I'd have a better view and reach. There is a cylinder filter that sits right next to the fuel inlet tube (above the rear right wheel) that I can get to but the service manual doesn't list that as a fix for the fill up issue. I guess I can disconnect it and see if it helps.

So the question is, anyone else run into this issue? If so, what was the remedy?

In the meantime, I will continue filling my tank at a dribble rate!! haha... ugh,

 

My old F250 had that problem quite badly. It's worse when the tank is 38 gallons and it's snowing outside with -10F and winds of 20mph.
I tried a bunch of tricks, nothing worked. I changed out the canister and it was perfect forever. The old one was filled with road dust and grime.
I think you'll have to Suck it Up and change it out.

 

I never got mine sorted because it is only an issue when the ambient temperature is high, car is hot and only on some stations, not all stations. Plus to do it you have to drop the gas tank which mean you also need to drop almost everything out of the rear end which is a lot to drop without a lift.

 

Could also "Pierce the neck". Just don't roll it afterwards or fuel will dump out and cause a fireball.

 

yea I'm not gonna change it just to change it. I'll continue the diagnosis.

 

I've never looked, but is there a way to bypass the canister temporarily and then fill the tank, see if it still backs up?

 

I was thinking of removing the lines one by one. See if it throws a code.

If I can get to both ends, I can find the blockage, if any. But it's tight up in there. I read fishing a thin flexible wire thru the vent lines might help. Compressed air would probably be dangerous since it might blow the carbon out of the canister and make things worse.

Just thinking out loud....

 

Curious .... does it happen when you are filling up on empty? Or is there still a good amount of gas in the tank when you fill up?

 

both. The entire time I'm filling. If its half full, I can wait a minute to let everything settle and start again, the pump will still shut off after about 1/4 gallon passes thru.

I tried a lot of things like that. Even pulling the nozzle out a little to see if some air can get in the inlet tube to help the flow. It didn't...

 

Maybe compressed air down the filler tube, that way if anything blows out of the canister it’s going the right way, and not into your tank.

 

I have an 2011 XKR and after I bought the car I had this issue occasionally. What I do now when I fill up is only put the nozzle in about half way and I don't squeeze the handle to fastest output of gas. Now I have no problem with the pump shutting off. This solution may not work for you but give it a try.

 

I have this issue sometimes with my 2010XKR. I find that when the gas station has service done to their pump, change filling hose and nozzle the sensitivity of their system sets it off. Next time it happens try a different pump, works for me

 

I had this issue on my '07 XK at the local Sam's Club gas station. Sam's Club updated their pumps and the problem went away. Try filling up at a different brand and station as the pumps at the station you are using could be overly sensitive.

 

I do this now. It helps, but just a little.

I use Chevron and Shell. Both do it. I can certainly try another next fill up.

 

yea I'm looking into this. If I can find an accessible point. No way I'm dropping the rear end and fuel tank

 

Try pulling the pump nozzle out about 1/2 inch or so. That always works for me.

 

Okay, follow closely here...
Get a plastic/rubber hose/tube that will fit over a fuel pump nozzle, then get another hose/tube that fits inside that one. Put a 2-foot 1/4-inch length of tubing through a hole drilled halfway along the inside hose/tube and put only a couple inches on the outside of that tube. Then insert the contraption inside the fuel door when you refill, and put the pump nozzle in the very outside tube/hose.
The two-foot 1/4" tube will act as an air relief valve and dissipate the excess pressure from the fuel tank from far below the filler neck.
Maybe???
I dunno.
Try it and let me know!

 

All of seem to know that this is a back pressure issue and it could be the nozzle itself creating the back pressure or possibly a clogged canister line.

Canister/lines get clogged when people keep topping off their gas tanks at fill up. Again, not news and applies to every car.

If Shemp hasn't been doing that, it's probably not the issue. Shemp, if you do run a wire down the canister line, consider using weed whacker line and melt the end a bit so no sharp edges instead.

Also as an alternative, Trying a vacuum instead of compressed air? Just throwing some thoughts out there.

 

Weed whacker line... I like that idea. I don't know if I'll get a chance this weekend but I'll update the post with any findings.

Cee Jay, in theory, your idea will probably work but there's no way my wife will want to use that thing at every fill up

 

I think Cee Jay's idea was a test device to eliminate the canister/line being the problem?