Why 350z stalls and struggles to start?
 

Idk why it hardly starts and stalls, Ive replaced all the spark plugs, cam sensors and crank sensor still nothing, any help or solutions?

You might think about taking your car to a mechanic to have it fixed.

I'm planning on it just wondering what to try first and identify the problem

Try paying the diagostic fee.....then they will tell you whats wrong

I agree with travlee. Rather than “throwing new parts at the problem,” see if you can get a diagnostic code.

If you cannot get a code, then do what KornerCarver recommends…
…because the problem’s cause could be many things, including fuel starvation, coil pack, etc.