injector noise

[marv]

I have intake off for cleaning today and heard a strange noise, sounds like a air, leak. The noise is coming from an injector at end of rail on drivers side. I can put my finger over tip and it dulls the noise so it's that injector. Is this injector bad or does it need to be cleaned. There is no fuel leaking from it.

 

[rubydist]

the injectors are sealed to the fuel rail and to the intake with o-rings. sounds like that one has a damaged o-ring allowing a vacuum leak. I would replace all the o-rings.