I have Focus 2007 1,8 TDCI. When I try to pump gas (it's a diesel) at full speed, gasoline comes back out of the fuel filler neck. I tried at two pump stations. I can refuel slowly.
I've just bought a car, and I don't know about it's history. I went to the service and the serviceman checked the fuel and air tubes, but found nothing.
Any idea?

[color=#0000ff][size=5][font=comic sans ms,cursive]I had a similar problem on my last Ford, I cured it by feeding a length of clean dry garden hose pipe down the fuel filler to check for obstructions, pulled the hose pipe out it looked clean and on the next fill all was OK again, it's worth a try.[/font][/size][/color]

That's what my serviceman also did, pulled it all the way down after he detached the fuel filler, but didn't help.

[quote name='ForTim' timestamp='1351091086' post='213371']
I have Focus 2007 1,8 TDCI. When I try to pump gas (it's a diesel) at full speed, gasoline comes back out of the fuel filler neck. I tried at two pump stations. I can refuel slowly.
I've just bought a car, and I don't know about it's history. I went to the service and the serviceman checked the fuel and air tubes, but found nothing.
Any idea?
[/quote]
A mate of mine recently bought a mk2 and had the same trouble,
Took it back to the garage and they denied that it could happen.
So he handed the sales man a 5 euro note and said "try put that much in the tank"
Sales man got soaked in diesel and they replaced the filler pipe from tank to flap.

[quote name='Lenny' timestamp='1351164408' post='213574']
..Sales man got soaked in diesel and they replaced the filler pipe from tank to flap.[/quote]
If that's the solution, fine. But, what's the problem? Isn't the filler pipe just pipe, how can it be damaged? I understand that if it's clogged it doesn't work, but when you pull some rubber pipe all the way down the filler pipe, what's the obstacle then? Maybe it should've been done with some flexible scrubber...

[quote name='ForTim' timestamp='1351168819' post='213585']

If that's the solution, fine. But, what's the problem? Isn't the filler pipe just pipe, how can it be damaged? I understand that if it's clogged it doesn't work, but when you pull some rubber pipe all the way down the filler pipe, what's the obstacle then? Maybe it should've been done with some flexible scrubber...
[/quote]
I'll ask him next time I see em but I think he said it was a problem with the capless filler end of the pipe
Some spring or somthing inside was failing to open fully when the nozzle from the pump was inserted.

Have a look at this, it shows the flap design inside the easyfuel system so you can see how the inner mechanism works.
It may well be that most fuel pumps just don't have long enough nozzles to fully disengage the mechanism.

[url="http://www.motorcraftservice.com/vdirs/retail/Easy%20Fuel.pdf"]http://www.motorcraftservice.com/vdirs/retail/Easy%20Fuel.pdf[/url]

I haven't solved this yet, although I tried a second time, when my tank was empty, so it was disengaged. My Focus is early 2007, I don't have Easy Fuel system. Replacement fuel filler is 250 euros plus work.

There are a number of people with the same problem:
http://www.focusfanatics.com/forum/showthread.php?t=299394
http://forums.focaljet.com/mk-i-tech/563585-problems-gas-tank-when-filling-up.html
Later link mentions some Ford TSB 07-08-01.

There is some solution which I have to try titled "Gas Tank Won't Fill? Let me show you how to fix it!":
youtube.com/watch?v=ksHqjydj5bA

Hello all. I still have the same problem with this. Both the fuel filler and air tubes look clean, so it must be something with the filler mechanism. Probably like Lenny said: "Some spring or something inside was failing to open fully when the nozzle from the pump was inserted." although I don't understand whether it's fuel or air that's not open in that case. Can someone post that Ford TSB 07-08-01? Thank you