Difficult refuelling 101. A quest.
 

If anyone is interested, I am documenting my "difficult to impossible" refuelling problem over here:

Changed gas tank bleeder valve, now it won't fill! - 986 Series (Boxster, Boxster S) - RennTech.org Forums

Here's the first post. Feel free to chime in. I need all the help I can get! :)
And yes, I have used the search tool.

In the "If it ain't broke" category.
Symptoms:
Hard start when warm, after sitting for 15 minutes or so; intermittent Coke bottle sound (low whistle) at low speed. No problems fuelling car.

Attempted solution:
Changed bleeder valve, also known as fuel tank ventilation valve 99620114301. This valve is not electric but mechanical. The gas cap, when closed tightly, pushes a little piston which opens the valve to recirculate the vapours.

Result:
Can't put gas in the car! Takes about a litre then spits it back out at me!

Okay, so I have obviously up royally here. So I tried putting back the old part. Nope. Poked my finger in the filler flap: No click (should there be one?). Checked the E6 fuse. Seems okay. Could it be another valve/switch or what? And what have I done to cause this, aside from fixing something that wasn't broke?

2001 Boxster S tip

Good info here:
Need help! I almost figured out my fuel tank problem... - Pelican Parts Technical BBS
It is a common problemmuch discussed in Search
BTW check E7 not E6
Let us know if that fixes it

Solved!!!
 

Thank you Gelbster for this link! :):)
In fact, it was the magnetic switch which was not inserted into the space provided for it in the valve. It had fallen out when I pulled the old valve but I didn't notice. I did see it but couldn't find any information on it until I saw this post.
Thanks again! :dance: