I have a 92 honda civic ex 4 door, it won't start when I turn the key it sounds like its going to turn on but I guess it just needs a spark to ignite, but I already changed the main relay, spark plugs, and distributor, but I just can't find the problem,

If the CEL comes on and goes out, after the ignition switch is turned to ON (Position II), then focus on the distributor. Be advised that over 50% of new aftermarket distributors for Hondas, at AMHD, don't work. Therefore, I only recommend genuine Honda distributor housings--aftermarket igniters and coils are fine, however.