How Many Times Do Spark Plugs Ignite?
How Many Times Do Spark Plugs Ignite? A complete combustion cycle takes two revolutions of the crankshaft, so the spark plug(s) would fire 1,000 times in a minute. If the engine used a wasted-spark ignition design, common on simple carbureted engines, the plugs would fire 2,000 times, with every other spark having no effect. How