^^^I could have sworn I remembered reading about something like this on TY, but I just spent 15 mins searching on TY and couldn't find anything.
Off the top of my head, it could be the fuel pump going out, or a loose connection. The fuel gauge flashing is a trouble code for something, I just can't remember what. I would also recommend throwing up a post on TY, someone there will be able to help.
Post back if you find an answer to your problem. I'd like to keep that info in the back of my mind in case this happens to crop up on my machine.