What are my spark plugs saying?

toolmanmike said

What engine, compression and what number of Autolites? They look pretty good and as long as it doesn't ping or kick back against the starter who cares. It will run cleaner with a heat range hotter especially if you use ethanol.

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Compression is 9.5 and plugs are AP65. Occasionally it will run on slightly when turned off. I have trouble hearing the engine when driving because the exhaust is pretty loud in the cabin. But I don't notice pinging when idling or when I bump the throttle under the hood.