Fuel injector and secondary ignition waveforms can show the condition of the fuel and ignition system, and combined they can give you new insights on misfires and if they are related to the fuel or ignition system.
Scan tools can tell you if there is a misfire and which cylinder is misfiring. Rarely will you be able to determine if it is the ignition coil and spark plug or if the fuel injector is causing a rich or lean condition. With a scope that has the correct probes, it is possible.
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