I too had this happen on my GTR, i replaced all the seals, O rings etc and they just kept leaking. I cleaned them off so they were dry and started it up to see where fuel was coming from and it started seeping from the sides of the injectors ! Replaced with some 2nd hand jobbies and all was good. Note: mine started leaking not long after i had overheated the engine with a split hose, so maybe the heat had damaged them internally ?