This used to happen once in a while, now almost all the time, fueling 98 Disc, gas pump keeps kicking off. There are a few lines on the Disc, to canister to engine, etc. Is the actual vent line in the fuel filler neck or the pig tail
coming out on the top side of the tank? I even disconnected that today and still gas regurgitates and the gas pump cuts off.

 

#4 Anti-Trickle Valve >> Fuel Filler Trickle Valve (Genuine Part # VUB502530 ) - Land Rover filler caps from Atlantic British

 

How do you get that thing out? From the inside of the cargo compartment?
I suppose bypassing is not a good idea?

Ok, I see the remove instructions in the D1 Manual starting Page 309

 

#4 Anti-Trickle Valve >> Fuel Filler Trickle Valve (Genuine Part # VUB502530 ) - Land Rover filler caps from Atlantic British

this is for a '99 Discovery 2. Will it fit a 98?

 

Yes, if your '98 has AELSystem. I was going off your original pic and that's an AEL setup. If you are unsure what you have start here > How To Identify The Evaporative Emissions Family Of Your Discovery 1

The pics are of the 2 systems.

 

Looks like the one on the top right. Going to check the numbers. LOL, as usual, mine is neither one of these numbers, but I googled my number and got this: https://landroverforums.com/forum/di...-family-21961/

 

Another part to replace/clean is the breather tube (#15 in the pic), the little check valve can get gummed up. > BREATHER TUBE FUEL FILLR DISCOVERY I w/E, ESR3868, RNS792 - Rovers North - Classic Land Rover Parts

These vids might be of some use to you. They aren't great, but at least you will get a good look of the parts and where they live>

 

Best method to discover if you have AEL or not....
https://landroverforums.com/forum/di...02/#post567770

 

I read something on that but there were no pictures. I have the one in the 2nd foto for sure, square canister.

Now I just need to get my buns in gear and work on this thing. Last 3 times I got gas the pump kept shutting off. It only did it maybe once every 10 fillings before. I don't drive it that much so really was no hassle then, but every time now, a pain in the butt.

 

The 3 videos are good, gives me an idea what I'm going to get into. What I noticed is that flap just inside the filler neck (and D1 manual hints at it) pushes against the trickle valve when the nozzle is inserted which pushes the flap against the plunger of the trickle valve.
You can feel that when you push down on it with your finger. Caution, don't let your finger get under that flap, have a long screwdriver in hand if you do.