[luke91]

Well, here's what I found out today...
The first thing I did was start the engine.  It started on three cylinders and continued to run on three cylinders consistently.  Next, I unplugged each injector, one by one, to see if one of the cylinders wasn't firing, and to rule out a timing problem.  When I unplugged the first cylinder, there was no change in idle, but when I unplugged each of the other ones, the engine vibrated and the idle dropped.  Now I know, for sure, that the engine is running on three cylinders, and that the problem is in cylinder number one.
Next, I switched the injectors from cylinders number 1 and 2 with each other to see if the problem is a bad injector.  I preformed the same test as above, and the results were the same.  When I disconnected cylinder number 1, there was no change, but when I disconnected each of the other cylinders, the engine ran on two cylinders.  Clearly there is nothing wrong with the injectors.  

The next test was to see if an ignition component had gone bad.  I pulled each plug, one by one, attached it to it's corresponding coil pack, grounded it, and started the engine.  Each one sparked regularly.  Now I know there isn't anything wrong with the ignition system.  

So here's what I learned for sure:
cylinder number 1 is not firing
all Injectors are good
all spark plugs are good
all coil packs are good
all ignition system components are good.  

My next step is to test the voltage in cylinder number 1's injector plug.  I am almost 100% sure that's were the problem will be.  If so, I'll pull the entire wiring harness, unwrap it, and test each wire for continuity.  Any suggestions would really help, here.  Any.
--luke