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Old 11-26-2007, 08:37 PM   #1
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almost all engines base the injector opening time on rpm. you need pulsewidth AND frequency. frequency is rpm (usually not /2) usualyl based off the crank angle sensor (cam position sensor (located in the distributor in non-coilpack ignition) in older cars) pulsewidth is based on rpm, airflow/temp, and load (throttle position)
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