Basically you can check a coil the same way as a spark plug. If you hold the end of the wire near the engine block or a ground, it will spark. DO NOT TOUCH THE METAL PART OF THE COIL WIRE!!! You will get one heck of a shock if you do.
Here is a how to for checking ignition spark:
As far as an injector pulse, basically you remove the electrical (one at a time) from each injector. With a noid light, you test the plug to see if it is getting power as the engine is being cranked. What happens is everytime the injector is to inject gas into the engine, you will get power to the injector. Since you have it disconnected with a light on it, the light will flash. Since the power to the injector is timed and not constant, if will flash on and off. The flash is what I refer to as the pulse.
Wednesday, October 7th, 2009 AT 7:30 PM