Away from the block and crank the engine, if a normal spark occurs - then the problem is most likely not in the ignition system. Check for fuel system problems, or fouled spark plugs.
If the secondary circuit checks out properly (there is spark), then the engine condition is probably not the fault of the ignition system. To check the secondary ignition system. perform a simple spark test. Remove the one of the plug wires and insert some sort of extension in the plug socket. An old spark plug with the ground electrode removed make a good extension. Hold the wire and extension using an insulated tool (NOT BY HAND) about 1 / 4 in. (6mm)