I somehow had the impression that injector resistance was supposed to be 16 ohms for the 3vzfe, but from looking around I'm guessing I'm wrong and it's 14. At least 4 of my injectors are in the 15.5-16 range, should I replace them?

And how many nozzles are there? I see four holes on the bottom but two of them seem to be blind. I'm wondering how I should clean them.