Nissan Repair: engine trouble at start, mass airflow meter, fuel pressure gauge

Question
I attempt to start the engine, and it tries to turn over, then I get a 'click, click, click'.  I just purchased a new battery in January, my posts and battery cables look great.  After I attempt to start it 3 times or so, it works. I can cut it off and start it again. How can I tell if it is my fuel pump, or other issue? Check engine light stays on also, supposedly due to O2 sensors.

Answer
Chap,

Either you have sticking injectors or the mass airflow meter is messing up.  Check these two things out and email me back.  The injectors and the potential of leaking can be checked with a fuel pressure gauge.  The air meter reqires a volt ohm meter and a Haynes Book for the procedure and the required values.