I think my subie, 06wrx, isn't getting fuel pressure in the engine. Are there check valves in the 06 wrx? (What I mean by "check valve" is a spot in the fuel line where the fuel is allowed to go one way but not the other way, sort of a one way street for fuel, so that way it keeps the pressure in the engine)
Or is this a fuel rail problem? maybe in need of repair or replacement?
any info is appreciated