i replaced the plugs in the car. theyre platinum tipped from the factory so i got the platinum tipped ones, thats all the sell for that car. I did not replace the whole sending unit, but when i took it apart it didnt look like there was any check valve really. its def not leaking gas at all. im gonna throw a new filter on it and see if that helps at all. my girlfriend and I are really just pissed about this now. Thanks for all the help fellas. im gonna be looking at this tomorow all day.