You can rent (pay a deposit, get it back when you return it) a noid light test kit from several auto parts stores (oreillys and autozone, rent them here). That way you can see if you are getting an injector pulse (my guess is that you aren't...so I would just skip to the checks below).
If you are not (or if you don't want to do the noid light test), you need to check the wires coming from the ECM to the injector for continuity (disconnect battery, hook one meter lead to the wire at the ecm connector, hook the other lead to the wire at the injector connector). Check both injector wires. If either injector wire doesn't have continuity, then you need to find out where it is broken (it could be the actual wire, it could be that it isn't making good connection in a connector). You should be able to isolate where the problem is without unwrapping the wiring harness.
Another thing you need to check is to make sure the red injector wire isn't shorted to ground. To check this, hook one meter lead to the red wire, hook the other meter lead to a good ground source. If you have continuity, then the wire is shorted and you need to find out where it is shorted and correct it. If it is shorted to ground, once you correct the issue, you need to check all the fuses again, as it could have blown a fuse.
I am still not sold on the fact that you have good fuel pressure/supply. If nothing else, at least do this check.....pull the metal fuel line off the back of the TBI, have someone turn the key to run, while you hold the end of the line in a container. It should pump a full stream of gas for 3 seconds, until the fuel pump kicks off. It should be about 3 to 4 oz. of fuel. If the fuel stream dribbles or sputters, then you have a problem with fuel supply...either a pump that is only half-ass working, or a restriction in the line somewhere (or low fuel level...but I am sure you made sure to put enough gas in (at least 2 gallons in a completely empty tank) that you wouldn't have that problem, right?). If that test checks out, have someone try to start the engine while you hold the fuel line in a container again....the fuel pump should start pumping a full stream again, as soon as the key is turned to start.
I know all of this probably looks like a lot of stuff to check, but it really shouldn't take you more than about 30 minutes to check everything I listed.
Let us know what you find.