You'll have to search to find out...this is a wagon right?

If so...I am not sure...its going to be near the drivers side rear tire (in front of the tire) on most cars...check there first.

Look for a bell shaped thing pointing down...its likely its plugged.

Woosh is bad...you never want your tank to make noise when you open it.

Vac means the lift pump is having to work hard to get fuel = reduced power.