i did a plenum pull and replaced the valve cover gaskets and plenum gasket and now i hear some sort of leak. it sounds like it is coming from the passenger side somewhere. i know its not any of the vacuum lines because i have checked all of them. im wondering if it could be the fuel rail seals or if one of the exhaust gaskets didnt take. does anyone know how a leak with them would sound? any help would be greatly appreciated as i dont want to have to pull everything off again. ive been without my z for 6 weeks now and i want to drive her!