So I’m new to this and I made an account to see what I need to do . I have a 2003 350z 6 speed and I have just replaced the clutch and fly wheel with a stage 2 platinum racing clutch and fly wheel . Done the job in a little over 6 hours got my car back together and the thing will not start . I’ve been told it was because of the crank sensor right by the fly wheel . I’ve also noticed that my Rpms are not moving at all when I turn it over . Is there a way to get a crank sensor to match it or am I dead in the water with that fly wheel ?

 

Sadly, it sounds like you need to remove everything you just did and align the flywheel correctly. There's a small dowel pin to use for the correct alignment.

Or, it could be something else fairly minor (like the starter not being re-installed correctly if you removed it or not connected properly).

 

make sure the starter is working properly, take it to a starter shop. not auto zone or anything of that sort since they only check amp and not mechanically

 

+1. This is what I initially thought upon reading.

Another suggestion, Pull your Crankshaft Position Sensor and ensure you did not inadvertently damage it during re-assembly. If you do tear everything back apart, inspect the flywheel and ensure it is not damaged. Damaged teeth on the flywheel do occur and are easy to overlook.