1988 Jeep Cherokee Dead Cylinder?

I changed the plugs and wires a few weeks ago, then the cap and rotor this weekend.
I was going to work and hit the gas and it devolped a pretty nasty miss. I pulled wires off of 2 of the cylinders and no change. I then took the plugs out of the two and they are smoked black. To me it looks like a carbon black and not an oil black. I put new plugs and wires again and no change. Read a couple of things and talked to a couple of friends and they say either dead/clogged injectors, bad coil or a timing/cylinder issue. When I pull the wires off the other 4 the car dies. Looking for some help. Dont know where to start next. Any info would be great.

Thanx

Shane