Let me ask you some basics...forgive me if this sounds dumb, but....
Do you have fuel pressure?(is the pump running, and priming)
Are all the harness plugs plugged in? (pull each plug and check that the pins are secure....somtimes they push out the back)
Is the PCM getting the right power? (4 ign. pos, and 1 constant pos)
Are ALL the grounds wires earthed? (add extra engine to chassis grounds if necessary----is the battery neg. making a good ground to the chassis?)
Do you have fuel in the tank?
Double check the routing of all the ign. wires from the opti to the plugs. The opti has the numbers printed on each terminal.
Are you getting power to and from the coil/module?
Are you getting spark at the plugs?
Are the injectors firing?
If all the above is correct, then it should fire.... :|