Injector(s) vs. Wiring vs. ECU vs. ??

[freeb]

Some Updates:

Plugged in the ECU I bought off Ebay. No change. Finally pulled the upper half of the intake plenum off. I'm not really positive what I want to do next.

The first thing I noticed right away was a reddish brown color that dripped from the gas line when I disconnected it from the injector rail. I'm assuming it was rust. Probably not good.

Next thing was that the short and thin rubber hose that attaches to a fitting on the bottom right (firewall side) of the injector rail was not connected. I see that one end attaches to a thin metal line which loops around to the other side of the engine block and a rubber hose feeds into something with a red wire connection near the oil filter. I don't know what this is. Does anybody know?? Hope I'm not being to vague.

The EGR Valve had a really old gasket. May have been the reason I heard a vacuum leak in that area. Haven't been able to disconnect it from its pipe yet. Sprayed with some PB Blaster

The intake runners for #1 and #2 cylinders is really carbon and gunked up.

3 of the nuts for the chamber were loose!!

Does anybody know how the fuel delivery system works as far as getting the fuel to the injectors? Is it possible that it's not actually the injectors which are clogged? Could the fuel not be even making it to the #3 and 4 injectors for some reason?

The injectors wiring look okay. Didn't look like I have any leakage at the injectors. There was a lot of gunk around there and it seems that it would have been at least partially dissolved if they're leaking.

Time to tend to some bloody knuckles......