Hey guys,
So i have a 2003 350z 6 speed manual and my engine blew so i bought another engine and i got it installed and everything and the engine wont start. it wont turn over. The engine is getting fuel and the spark plugs are fine and the coils are too. The starter is fine and the fuel pump is working. oh the battery is new too. all the sensors are plugged in and ground wires. i plugged in the computer and no codes apear. Any ideas guys? oh the old engine came from a g35 auto. im using my own harness.

 

is it not turning over, or not cranking?

 

its turning over but its not firing, its not getting spark

 

And your sure the rear cam position sensor is plugged in? It's on the drivers side rear of the engine under the intake. You say the coils are working well apparently not if now you say you have no spark. Fuel, air and spark make the motor run. Figure out which one isn't there and trace it back.

 

i got it guys it was the crank position sensor and bad gas. thanks for the replies!