I have a 1990 240sx sohc revival in progress. About a week ago I changed my fuel filter, which really seemed to bring the car back to life. It may have been doing it before, but I just noticed that my front (standing in front of the car) fuel injector is leaking. The car has over 125000 on it and I may have replaced the original fuel filter, lol. Could the new pressure have cause the leak and what are my odds that it is just an o ring. It is leaking from the top of the injector. Thanks, I am trying to save from pulling the fuel rail and replacing an o-ring if most likely it is a bad injector anyways. The car seems to run pretty well also.
Nick

 

prob just an o-ring. my number 4 injector is was leaking and that is what i found. I dont find it likely that your injector cracked without being hit by something.

 

Get a full set of Orings (cmon they're not that expensive) and replace all rings since you'll have to pull the fuel rail anyways to get to 1 injector. Think ahead ---->

 

**** the Nissan dealer here wants $5.00 (that should only cost about $.30) for the smallest o-rings for the injectors here, forget how much they want for the larger one...