Show us some odd ignitions from the past

67Dart273 said

Don't you have a 10:1 probe? Some scopes will tolerate that kind of voltage "direct" just look at the "Volts per cm" or better yet what model/ brand is the scope?

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I have a modern Rigol digital scope and an HP analog. My probes are 2Ghz 1-10-100x if that matters. Thay motor is close to running again (my Mazda 2.0) so I'll give it a look once it's idling on its new head gasket and not pumping water into the oil...!