[unicoladron]

1. remove one of the spark plug wires from the spark plug.
2. get old or "extra" spark pug and plug it into the wire.
3. hold spark plug over valve cover. (do not shock yourself)
4. crank engine (a friend, girlfriend, or neighbor really helps here)

do you see a spark or hear "crackling"?

repeat this on all of the plug wires.

this will ultimately determine if you don't have spark.