How do you test ignition/spark power?

91CaliTBIRD

Registered User
Hi, im wondering if its possible to test my ignition components like DIS,EEC,Coil and whatever else makes spark. I am giving it a tune-up and besides changing the plugs and wires, i dont know how to check what else could be weak and not sparking at 100%. Thanks -150,000 miles-
 
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