I had an interesting phenomenon reappear in my '97 D1 last week. I drove the family to the beach on vacation and went to refuel halfway through the week, but when I inserted the gas pump nozzle into the filler neck and attempted to fill up the tank, fuel backed up and spewed out of the opening repeatedly. I could get it to accept fuel if I filled it at a snails pace, but anything faster and the gas pump would cut off or gas would bubble out of the top as if it were full or air was pushing it back up the neck. Ultimately I was able to fill the tank, but it took almost 40 minutes. This happened a few times 6 or 8 years ago, but didn't happen today when I filled up. Any ideas?

 

It could be the gas pump itself. There is a gas station in y neigborhood that I cannot use because the shape of their noozle.
Otherwise your vent tube is clogged.

 

Try the anti trickle fill valve ........ its on the fuel filler neck maybe you need a new O ring

 

Remember it happens periodically, eg. last week, not this week and previously 6-8 years ago. Another clue is that air and gas seem to be bubbling up the vent tube just like the filler port. It almost looks as if it is boiling.

 

Sorry, I'm out. I got nutin'

 

Old post, I know, but I have the same thing happen only a couple times a year on my 98 DI. It's not the pump - when it first happened I went to the attendant and complained. Then I went to another pump and it happened again.

With $4.50 of new gas, I drove on. After work, I went to another filling station. No problem.

It happened months later. I went across the street to another filling station. Same thing. An hour later, I went back and the truck fixed itself.

 

Gas can back up when you go to some gas stations.
Avoid those and go to another....
Sorry, but, learned from experience...

 

Pour injector cleaner into the vent tube in the filler neck, trust me, it works. (most of the time)

 

I said it's not the pump. I go to to same station again all the time. It happens very infrequently and if I come back in an hour, it's fixed.

I'll try the injector cleaner. It happens so infrequently, I dunno when. (it happened yesterday. That's why I went looking for a forum solution. )

I wonder if another solution is to poke a siphon hose down the neck?

 

Its the vent tube not letting air out for whatever reason.
Mine does this every once and a blue moon and when it does I pour a bottle of injector cleaner or Seafoam down the vent tube using a small funnel.
Then the problem goes away.
I have no idea why it happens, I have gotten into the habit of pouring a bottle of injector cleaner into the vent tube once a year and I have not had any problems since I started this practice.