Car is not turning over
 

My 2010 370z with a Stillen supercharger on it is not starting..
It cranks over and i smell fuel but its not turning on.
I have cleaned the MAF and still nothing, i got the Code P1239.

The car gave me a bit of trouble last few times i drove it with not starting up right away but after usually 2-3 tries it would crank.
This time ive tried starting it over 20 times with no luck.
It does sometimes make one full cylinder cycle and you can hear it but wont stay on.

Any idea where what to do?

http://www.the370z.com/forced-induct...dtc-p1239.html this seems to settle it, is your kit old? new throttle cables seem to have fixed it for a few in that post