Just to double check to see if your injectors are getting power and narrow down that is not a fuel supply issue, you can also unplug the injector wiring plug off of it, and take a 194 bulb, straighten out the the little wires for the contacts and plug it into the injector harness plug. Then try and start the engine. The bulb should pulse with light if you are getting power there. If you are not getting any power and you have no codes at all (which seem odd?) I would go back to S & P and see if they have a tech person to try and trouble shoot it and verify the computer is not an issue and that there are no issues with the loom itself.
(For what they charge for thier stuff, they sure should have a good tech department I would think)