![]() ![]() It seems like an rpm meter wouldn’t even be as complicated as a DVM, and Harbor Freight hands out DVM’s for free sometimes. ![]() I’d prefer a small hand-held battery operated rpm meter. Well, either I’ve let them set the RPM for me when I do an emissions test, or I’ve used a lab o-scope and wrapped a few turns of wire around the number one spark plug wire. ![]() You might wonder how I’ve measured the RPM up to now? I mean the car is over 20 years old. And I can access the plug wires of course. The Corolla has a tach signal point I can access at the diagnostic connector. My Corolla has an electronic ignition system and doesn’t use points and so I don’t think that meter will work on the Corolla. I have an RPM meter for my 40 year old truck with a points ignition system. ![]()
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December 2022
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