this is my problem, i have an 89 gta 350,i can't seem to fire it up.no codes changed cap, rotor ,wires , and had my coil checked and i get a code 12 so computer isn't it,there is gas in the fuel rail and in gas tank but it won't fire, what have i missed, i also checked timing and the dist is pointing correctly at num 1 spark i need ideas of what it could be,my brain can't seem to figure anymore ideas,thanks gm hombre.

 

Ignition module? Coil pick-up?