04 g35
Ok new ecu
New key an lock cylinder
New cam sensors
New crank sensor
New coil (old one burned out)
Car started and ran i turned it off went to restart it and just cranks now anyone ever experienced this befre or fix this issue need some new ideas

 

Take one of the sparkplugs, try to start the car and see if something occur with the sparkplug (spark), to doit right, do this with the help of a mechanic.
If not, then there's something wrong with the ignition, maybe a cheap relay.
If you can see a spark, then is gas related issue, maybe the fuel pump is gone, when the fuel pump have issues, sometimes start, sometimes wont, until one day it doesnt start at all.
sorry for my english, lack of practice

 

After I put my engine back in it wouldn't start. The fuel pump fuse had blown, replaced it and she started just fine.

 

Check the NATS? Did you have the key paired up with the security system?

 

Yeah the ecu came with the key and cylinder