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Vintage Pontiac Dyno Tuning Spark Plug Gapping Tool

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Here are a few tips for your dyno excursion: Before leaving for the shop, pull a spark plug and examine it for detonation and/or abnormal wear. Replace your plugs (and properly gap them) if there is any wear, and don't forget to make sure that you have fresh fuel, a fuel filter and a PCV valve (if so equipped).
Dyno Tuning Basics - Jets, Timing, Camera, Action

Here are a few tips for your dyno excursion: Before leaving for the shop, pull a spark plug and examine it for detonation and/or abnormal wear. Replace your plugs (and properly gap them) if there is any wear, and don't forget to make sure that you have fresh fuel, a fuel filter and a PCV valve (if so equipped).  View Related Article