1992 Chevy S-10 2.8l

I have done work on my engine, and at one point had it running. I was going out to adjust the timing and the engine wouldn't run. I found out that the wire was mot connected to the ignition module. I fixed that and now have no spark on 2, 4, or 6 cylinder. I have it on the other side, but no engine start. I replaced the Distributor cap, rotor button, and spark plug wires. At a loss here and would love to have my engine adn truck running once more.