Take a spark plug, ground it with a wire around the threads, and stick it inside the coil then go crank it over (wear some thick rubber gloves if you're holding it or use a pliers with some gloves, just to insure you don't get shocked even if you probably won't). If the spark plug sparks then you're good up to that point. Now put the plug inside the coil wire and connect it to the coil, grown the plug and crank it, if you've got spark there as well then it's not your coil wire. Next is to pull off a spark plug wire from a few random cylinders and repeat the plug test. If SOME get spark and others don't, 2 possibilites; 1) you're wires on those cylinders are bad or 2) your cap/rotor/opti is bad :\ Easy way to rule out #1 is if you are getting spark from other cylinders, is to take that plug wire and put it on the cylinder that isn't getting spark and repeat the previous test.