my 2008 wrx started having this problem about a week ago, it did it for a second time tuesday night and left me stuck 45 mins to an hour from the house. I ended up having to call my family, and we where able to stick a coat hanger down the filler neck, and got 2-3 gallons end, I'm going to have to try the recommend stuff. thanks, also any one know how much the purge vavle will cost. sorry to high jack I'm a newbie.